Illustration of a skinny guy with bony shoulders building bigger deltoid muscles and broader shoulders.

How to Build Broader Shoulders (for Skinny Guys)

Broad shoulders are touted as one of the most attractive features a man can possess. That’s not wrong—building bigger shoulders will improve your appearance—but it’s not the whole story, either.

Then there’s the issue of bone structure. The length of your clavicles (collarbones) determines how far apart your shoulders are. This comes down to genetics. If you have a thinner build, you’re fated to have narrower shoulders. But that isn’t quite right, either. Some skinny men are able to add over a dozen inches to their shoulder circumferences. We’ll show you examples.

Finally, we’ve helped over 10,000 guys bulk up, tracking their progress along the way. If you spend the next 6 months bulking up your shoulder muscles, how much can you expect to add to your shoulder circumference? What will it look like?

A skinny guy bulking up and becoming muscular, illustrated by Shane Duquette for Bony to Beastly.

Understanding Shoulder Aesthetics

Both men and women find broad shoulders attractive, with most research showing that it’s the most important aspect of our physiques (study, study, study). That research can be misleading, and we’ll delve into why in a moment, but let’s start by talking about why broad shoulders really do look great.

Why Do Men Want Broad Shoulders?

During puberty, testosterone binds to the androgen receptors in the bones and muscles of our shoulders. This makes our clavicles grow longer and our deltoids grow bigger, making our shoulders broader.

Men produce more testosterone and have more androgen receptors in their shoulder girdles than women, so men tend to develop broader shoulders after going through puberty. This gives men a distinct shape from women and boys (study). As a result, people attracted to men tend to be drawn to broad shoulders. Men often want to be masculine and desirable, and so they’re driven to build broader shoulders.

The Adonis Index & the Ideal Shoulder Circumference

The ideal shoulder circumference is often said to be 1.618 times the size of your waist. So if you have a 32-inch waist, your ideal shoulder circumference would be 52 inches. There’s a grain of truth here that makes this idea appealing.

This shoulder-to-waist ratio is called the Adonis Index. The name comes from Greek mythology, where Adonis is the god of beauty and desire. The idea is that the human body looks most aesthetically pleasing when it conforms to divine proportions. In this case, the ideal male proportions are rooted in the Golden Ratio (Phi), a ratio commonly found in nature and classic art.

Before and after photo showing Shane Duquette bulking up, building muscle, and developing the ideal male shoulder circumference (the Adonis Index).

Here’s the grain of truth. This shoulder-to-waist ratio is fairly common among strong guys with healthy body-fat percentages. I never intentionally tried to get the ideal shoulder-to-waist ratio, but I developed it naturally while bulking up. That isn’t true for everyone, but it’s true for enough men that it often feels right.

The Problem With the Adonis Index

As I was going through the attractiveness research, I noticed that shoulder-to-waist and chest-to-waist ratios were used interchangeably. Our chest-to-waist ratio has nothing to do with our shoulder muscles, and yet a higher chest-to-waist ratio was just as indicative of attractiveness as having broad shoulders.

Both ratios were used as loose proxies of muscularity and leanness. The more muscular we get, the bigger our chests, backs, and shoulders become, giving us larger shoulder-to-waist and chest-to-waist ratios. The leaner we get, the smaller our waists become, boosting the ratio even further.

This gave me an idea. I drew a man with a greater shoulder-to-waist ratio and bigger shoulder muscles. Then I drew a man with bigger chest muscles and narrower shoulders. Both were similarly lean and muscular overall.

Illustration of a man with broad shoulders and a man with a big chest, testing the attractiveness of a large shoulder-to-waist ratio.

I surveyed 400 women, asking them which proportions they found more attractive. 65% of them said they preferred the guy on the right, with the bigger chest but smaller shoulder-to-waist ratio. Men had the same preference. I suspect that’s because, at least from this angle, the guy with the bigger chest looks stronger.

This lines up with the results of a study by Sell and colleagues (study). Sell found that stronger men tended to look stronger. Those stronger men were rated as more attractive by women.

How to Balance Your Traps & Shoulders

Some of the best shoulder exercises also train your traps. That’s true of both overhead presses and lateral raises. As you lift your arms up, you also shrug your shoulders, working your deltoids and traps together. That’s a natural, athletic way to lift weights, but some people worry they’re working their traps too hard.

They argue we should build bigger shoulders while keeping our traps smaller. The idea is that overdeveloped trap muscles make our shoulders look sloped instead of square.

Illustration comparing a man with sloped shoulders (from overdeveloped trap muscles) against a man with square shoulders.

There’s a glaring problem with this idea, but first, let’s get on the same page about what your trap muscles are and what they do. Your traps are the muscles that connect the base of your neck to your shoulders and back. They help you move your neck, shoulders, back, and arms. They also help us maintain proper shoulder posture.

Diagram showing the anatomy of your trap muscles and the best weight training exercises to bulk them up.

Of all our many muscles, our traps are some of the most important. You’ll notice them working whenever you carry heavy things, whether that’s doing deadlifts, lugging around heavy objects, rucking with a heavy backpack, or carrying your kid in your arms. The stronger you are, the bigger your traps will get.

Furthermore, men have proportionally more androgen receptors in their shoulder girdles than women. That means having proportionally bigger traps is distinctly masculine. Masculine traits tend to be attractive to women. Men also tend to find masculine things cool.

Here’s the problem. Some people think overdeveloped traps give guys sloped shoulders. That may be true, but if you’re a natural lifter following a balanced workout program, your traps won’t become overdeveloped. You’ll grow stronger overall, your posture will improve, your traps will grow bigger in proportion to your other muscles, and you’ll look better.

How to Improve Your Appearance

Broader shoulders look good because they showcase strength. The same can be said of building bigger traps, a wider chest, a thicker back, a stronger core, or bigger arms. That’s good news for us narrow-framed guys. It doesn’t matter very much if we have short clavicles. We just need to become strong and fit.

Illustration of a muscular shirtless man with the ideal shoulder circumference.

Still, building bigger shoulder muscles is part of building a stronger, fitter, and more attractive physique. You don’t need to give your shoulders a disproportionate amount of attention, but it definitely helps to bulk them up, just like how it helps to bulk up everything else.

Bone Structure & Body Type

Before we explain how to build bigger shoulders, let’s distinguish between having a broad bone structure and having muscular shoulders. There’s a large difference between the two, but that difference isn’t always obvious.

Most people place more weight on bone structure, but as we covered in the last section, that’s backwards. Broad shoulders symbolize strength. Being strong is more important than having long clavicles (though having long clavicles certainly doesn’t hurt).

Narrow Shoulders From Narrow Clavicles

Our clavicles (collarbones) grow steadily until we’re 12 years old, giving us 80% of our total clavicle length. When puberty hits, clavicle growth accelerates. By around 18 years old, our clavicles reach their final length (study). That means if you’re 18 or older, the only way to build broader shoulders is to build muscle.

Illustration of a guy with narrow shoulder bone structure vs a guy with naturally broader shoulders.

Some guys get lucky. They have long clavicles, giving them naturally broad shoulders. Other guys are naturally muscular, giving them naturally muscular shoulders. Some guys are blessed with both advantages. For better and worse, these guys are often called “mesomorphs.”

On the other end of the spectrum are the naturally thin “ectomorphs.” That’s my body type. I have a narrower frame, thinner bones, and a smaller appetite. Said another way, I’m naturally skinny. That’s where things get interesting.

Everyone Can Build Broader Shoulders

When I was skinny, I had narrow shoulders, as you can see below. At 21 years old, I weighed 130 pounds, my shoulder circumference was 39 inches, and I wore size small shirts.

Photo showing Shane Duquette before he bulked up from skinny to muscular.

Over the next few years, I gained 65 pounds, adding 13 inches around my shoulders and bringing my shoulder circumference up to 52 inches.

Comparison of people with naturally broader and narrower shoulders.

At this point, my business partner, Jared, started using me as an example of someone with naturally broad shoulders. Clearly, he argued, my clavicles had been long the entire time. As proof, he put me in a spread with other guys known for having broad shoulders.

We see this same thing all the time. Skinny guys feel like they have naturally narrower shoulders. Then, when they bulk up, they’re surprised by how much broader their shoulders become. For example, here are Josua’s before and after photos from doing our Bony to Beastly Program:

What’s interesting is that it isn’t just our deltoids making our shoulders broader. It seems that building bigger lats and serratus muscles—the muscles underneath our armpits—pushes our shoulders out wider. This can make it seem like our body type is changing.

Here’s another example, this time showing a side view. As you can see, with a few months of hard work, you can transform the size, strength, and shape of your shoulders.

How Much Muscle Do You Need to Gain?

Even if you’re a thin guy with a narrow bone structure, your shoulders have the potential to grow much bigger. They respond incredibly well to resistance training. Plus, many of the best shoulder exercises will also bulk up the muscles underneath your armpits, pushing your shoulders out wider.

Illustration showing a skinny guy building bigger shoulder muscles.

These guys both have the same clavicles, it’s just that one has bigger shoulder, serratus anterior, and chest muscles. This pushes his shoulders out wider and gives them more volume.

However, to make a noticeable difference, you might need to gain quite a lot of muscle. In our experience, guys usually need to gain at least 20 pounds to build noticeably broader shoulders.

For example, here’s Jared gaining 33 pounds in 3 months from an aggressive bulk. When he started, he was wearing billowing small shirts. By the end, he was fitting snuggly into medium shirts.

The Best Shoulder Exercises

Shoulder Muscle Anatomy

Our deltoids have three different groups of muscle fibres: the front delts, side delts, and rear delts. They all have different functions, making it impossible to train them all with a single lift (though the overhead press comes close). Our front delts push stuff away, our side delts lift stuff out to the sides, and our rear delts pull stuff in.

Diagram showing shoulder muscle anatomy and exercises for the front delts, side delts, and rear delts.

Our deltoids are surprisingly large. They’re around 60% bigger than our chests and 400% the size of our biceps. This gives them tremendous growth potential. The average guy doing our bulking program adds over 4 inches to his shoulder circumference in 6 months.

If you’re already in the habit of lifting weights and have already succeeded at gaining your first 20–30 pounds, we’ve got a more advanced list of shoulder exercises. Otherwise, keep reading.

The Best Front Delt Exercises

The front delts are the largest part of our shoulders. They’re involved during pressing movements, including bench presses, push-ups, and overhead presses.

Push-ups are the best exercise to start with because they work your chest and front delts while also bulking up your serratus anterior. If you’re a beginner, I recommend working towards being able to do 20+ perfect push-ups in a row. From there, you’re free to progress to weighted push-ups, deficit push-ups, bench presses, and dips.

Here’s Marco teaching the push-up. Note that he recommends pushing your body as far away from the gound as possible. That’s the part of the lift that engages your serratus muscles.

In addition to push-ups, we recommend overhead presses. Overhead presses do a great job of working both your front delts and your side delts, making them arguably the best compound exercise for building bigger shoulders. They’ll also bulk up your traps.

Once you’ve mastered the dumbbell overhead press, you’re free to do other variations, seated or standing, with a barbell, dumbbell, or exercise machine. I really like standing barbell overhead presses. Some people stick with dumbbell overhead presses forever.

The Best Side Delt Exercises

The side delts are at the sides of your shoulders, making them look broader. They raise your arms out to the sides, making them relatively easy to train. All you need are lateral raises:

The Best Rear Delt Exercises

The rear delts are at the back of your shoulders. They’re trained with pulling exercises like deadlifts, chin-ups, and rows. That’s often enough to bulk them up. However, if you’re eager to bulk up your shoulders, you can speed up your rear delt growth with isolation lifts like face-pulls, rear-delt flyes, or TYIs:

TYIs work your rear delts and traps through 3 different ranges of motion, giving you more balance muscle growth and doing a better job of strengthening your shoulder joint. Marco is demonstrating these without weight, but you can load them by holding dumbbells or smaller weight plates.

The Shoulder Workout Routine

If you’re already an intermediate lifter, we’ve got an article about shoulder workouts. If you haven’t gained your first 20–30 pounds yet, this one will serve you better. All you need are dumbbells or weight plates.

ExerciseSetsReps/Duration
Push-Ups3–4 setsAMRAP*
Dumbbell Press3–4 sets10 reps
Lateral Raises3 sets12 reps
TYIs3 sets6 reps per letter
*AMRAP: As Many Reps As Possible

It’s a simple but effective shoulder workout. Push-ups work your chest, front delts, and serratus anterior. The dumbbell press works your front delts, side delts, and traps. Lateral raises work your side delts, rear delts, and traps. TYIs work your rear delts, traps, and upper back.

  • Rest times: rest 1.5–2 minutes between each set.
  • Failure: push yourself on every set, going to the cusp of failure. Consider taking the final set of each exercise all the way to failure, especially on your lateral raises and TYIs.
  • Progressive overload: try to outlift yourself every time you repeat the workout. Fight to lift more weight or squeeze out more reps. If you got 10, 9, and 8 reps (27 reps) last workout, try to get 28+ this workout.
  • Form: watch the tutorial videos and try to lift with good form, but don’t worry if you can’t. It will come with practice.

You don’t need to do all of these exercises as part of the same workout. In fact, you should probably build them into a full-body workout routine, training your shoulders along with your other muscles.

Try to do each exercise twice per week. If you’re doing them all as part of the same workout, do it twice per week. That’s the fastest way to bulk up your shoulders.

Eating for Muscle Growth

Training your shoulders will stimulate 2–4 days of muscle growth. Then you need to eat enough food to build your muscles back bigger and stronger than they were before. That way, you show up to your next workout able to outlift yourself.

  • If you’re skinny-fat or overweight: you don’t need to worry about eating in a calorie surplus. You have plenty of extra energy stored as body fat. You can burn through that, using it to build muscle. Just make sure you’re eating a balanced diet rich in protein, starchy carbs, healthy fats, and fibre.
  • If you’re skinny or lean: you’ll need to get into a calorie surplus to build muscle. You’ll need to eat a good bulking diet. You need energy to convert the protein you eat into muscle, and you need carbs to pack that muscle full of glycogen.

Frequently Asked Questions

What’s the Bony Bump Above My Shoulder Joint?

The small bony bump above your shoulder joint is the acromioclavicular joint (ACJ). Some people have a more pronounced bump than others. Skinny guys have more prominent shoulder bumps, so we often get questions about it.

Diagram showing how to get rid of a prominent shoulder bone bump (acromioclavicular joint) by building muscle.

When you’re bony, your body is shaped by your bone structure. You have harsher angles and more prominent bumps. As you build muscle, that muscle will contribute more to your body shape. The bony protrusion above your shoulder joint will be buried by your upper traps.

I have a prominent bump above my shoulder. It’s much less noticeable now that I’ve bulked up, but it’s still there. I use it as a hook to keep straps from slipping from my shoulders. It’s great for carrying grocery bags.

How to Fix Poor Shoulder Posture

Because the modern lifestyle involves so much time spent sitting, it’s common to adapt to that position, developing internally rotated shoulders. That may be just fine for typing, but it can limit your range of motion and shave precious inches off your shoulder breadth.

Illustration of a guy with rounded, bony shoulders improving his posture.

The best thing for improving posture is also the hardest. Doing drills and stretches is easy, but it doesn’t always work very well. A more effective approach is to strengthen your entire body, including your postural muscles. Think of exercises like deadlifts, goblet/front squats, push-ups, planks, rows, and chin-ups.

The good news is that all of those muscles will help you build broader shoulders. Goblet squats, for example, are fantastic for bulking up your serratus muscles, improving your shoulder health while also pushing them out wider.

What If You Can’t Press Overhead?

If you have poor shoulder posture, it can limit your shoulder mobility. Many beginners struggle to press weights overhead, preventing them from doing the overhead press properly. Use this exercise progression instead:

  • Start with push-ups to bulk up your shoulders while strengthening your serratus anterior, allowing for better movement in your shoulder joint.
  • Use the incline bench press or landmine press to work your front delts without needing to press the weight all the way overhead.
  • Progress to the half-kneeling one-arm dumbbell press. This will teach you how to press a dumbbell overhead. Once you can do it kneeling, you’ll be able to do it standing.
  • The standing one-arm dumbbell press: once we comfortable pressing a single dumbbell overhead from a kneeling position, we can try it from a standing position.
  • The overhead press: once we’ve got the hang of pressing with one arm, we can start doing both arms at once, either with two dumbbells or a barbell.

If this still seems complicated, our bulking program will help walk you through the entire process of gaining muscle, improving posture, and building a strong overhead press.

How to Fix Bony Shoulders

Skinny people are often concerned about having bony shoulders. Sometimes dates and spouses complain about it, wishing for a more muscular cushion to lean against. Our members often write about this when they post their before photos. I’ve been there, too.

Fortunately, bony shoulders have nothing to do with your bones at all. It’s just there isn’t enough muscle on top of them. If you build bigger shoulder muscles, your shoulders won’t be bony anymore.

The overhead press: the best exercise for building broader shoulders.

Conclusion

Some guys have narrower bone structures than others, but everyone can build broader shoulders if they choose good shoulder exercises, lift for muscle growth, and eat a good bulking diet. With a good bulking program, you can expect to add 4–5 inches to your shoulder circumference within the next 6 months:

If you want us to walk you through the entire process of bulking up, check out our Bony to Beastly Program. It includes a customizable workout routine, a bulking diet guide, a recipe book, and support from us in our online community.

We’ll help you get started, track your progress, answer all your questions, and give you feedback as you go through the program. Your results are fully guaranteed. We have an unconditional refund policy.

Illustration showing the Bony to Beastly Bulking Program

Alright, that’s it for now. If you want more muscle-building information, we have a free muscle-building newsletter. More articles coming soon!

Shane Duquette is the founder of Outlift, Bony to Beastly, and Bony to Bombshell, each with millions of readers. He's gained seventy pounds and has over a decade of experience helping more than ten thousand naturally thin people build muscle. He also has a degree in design, but those are inversely correlated with muscle growth.

Jared Polowick, BDes, has a degree in design from York University. He co-founded Bony to Beastly, Bony to Bombshell, and Outlive, where he translates complex academic research reviews about strength, fat loss, and health into easy-to-read and visual formats that anyone can understand.

Marco Walker-Ng is the founder and strength coach of Outlift, Bony to Beastly, and Bony to Bombshell. He's a certified trainer (PTS) and nutrition coach (PN) with a Bachelor's degree in Health Sciences (BHSc) from the University of Ottawa. He has over 15 years of experience helping people gain muscle and strength, with clients including college, professional, and Olympic athletes.