Relative Size of 14 Inch Arms

By: Jeremy Fox, CNC, CPTPublished: July 26, 2022

Big arms are a hallmark of physical fitness and strength. And everyone loves an action hero with big guns.

That’s why arm curls are one of the most popular exercises at the gym. So how do you know if your arms are average or exceptional?

Well, upper arm circumference is a yardstick by which many measure their progress. But are 14 inch arms big? Read on to find out!

14 Inch Arms

What Are 14 Inch Arms?

Arm size is a circumference measurement of the mid-upper arm. So “14 inch arms” are 14 inches (35.6 cm) around at the widest part of the bicep and tricep.

How to Measure Your Arms

Before getting into arm sizes, make sure you’ve measured your arm accurately. Arm size is measured using a flexible tape such as a tailor’s tape.

First, raise one arm parallel to the floor and drape the end with the number “1” over the front of your bicep. Then wrap the other end of the tape around the widest part of your arm until the numbers overlap the end.

How To Measure Arms

The number that intersects the end of the tape is your arm size. As you can see in the image above, bodybuilders measure their arms flexed.

Tips: Do not pull the tape too tight or your arm will appear smaller. Also do not wrap the tape at an angle or your arm will appear bigger.

Are 14 Inch Arms Big?

Generally speaking, 14 inch arms are a pretty average size. For men, 14.6 inches is the average arm size. And 13.4 inches is the average for women.

However, 14 inch arms are on the small side if you have been working out for a while or have a large frame. Whether your arms look big on your body depends on your age, height, weight, and body composition.

14 Inch Arms by Age

Age is one of the most apparent factors influencing your arm size because we all start with skinny arms as children and grow through our teenage years.

Once you reach adulthood, your arm growth slows down. However, most people’s arms get a little bigger through their 20s and 30s.

At some point in your 40s, however, your arms might gradually get smaller. This decline is due to the drop in hormones and decreased physical activity.

Table 1. Average Arm Size By Age For Men & Women (Unflexed)

Age Men Women
20-29 13.4 inches (34.1 cm) 12.4 inches (31.5 cm)
30-39 14.1 inches (35.9 cm) 12.9 inches (32.8 cm)
40-49 14.0 inches (35.6 cm) 13.1 inches (33.3 cm)
50-59 13.7 inches (34.8 cm) 12.9 inches (32.8 cm)
60-69 13.5 inches (34.4 cm) 12.8 inches (32.4 cm)
70-79 13.1 inches (33.2 cm) 12.6 inches (32 cm)
80+ 12.1 inches (30.8 cm) 11.7 inches (29.6 cm)

The data in the chart above comes from the National Center for Health Statistics in the US. But it’s important to realize that these measurements are taken with the arm relaxed or unflexed.

Arm Size Flexed vs Unflexed

When you flex your bicep, your arm increases in size roughly 5-10%. So a 13.5” unflexed arm is generally about 14.5” flexed.

And, since you probably measured your arm flexed, it’s vital to adjust the data from the previous table to compare apples to apples. Below is the revised arm size data based on the estimated size increase with a flexed bicep.

Table 2. Average Arm Size By Age For Men & Women (Flexed)

Age Men Women
20-29 14.4 inches (36.6 cm) 13.3 inches (33.7 cm)
30-39 15.2 inches (38.6 cm) 13.9 inches (35.3 cm)
40-49 15.1 inches (38.4 cm) 14.1 inches (35.8 cm)
50-59 14.7 inches (37.3 cm) 13.9 inches (35.3 cm)
60-69 14.6 inches (37.1 cm) 13.7 inches (34.8 cm)
70-79 14.1 inches (35.8 cm) 13.5 inches (34.3 cm)
80+ 13 inches (33 cm) 12.5 inches (31.8 cm)

In Table 2, you can see that the average man has around 14½ inch flexed arms. Therefore, 14 inch arms are slightly below average.

For women, the average arm size is a little smaller at 13½ inches flexed. And 14 inch arms would be slightly above average.

To put this arm size data in perspective, it helps to look at it in terms of percentiles. This shows you how likely you are to have arms of a certain size.

Table 3. Arm Size Percentiles For Men & Women (Flexed)

Percentile Men Women
5th 11.9 inches (30.3 cm) 10.5 inches (26.8 cm)
10th 12.6 inches (31.9 cm) 11.1 inches (28.1 cm)
15th 12.9 inches (32.8 cm) 11.4 inches (28.9 cm)
25th 13.4 inches (34.1 cm) 12 inches (30.6 cm)
50th 14.6 inches (37.1cm) 13.4 inches (34.1 cm)
75th 16 inches (40.7cm) 15.2 inches (38.5 cm)
85th 16.9 inches (42.9 cm) 16.2 inches (41.2 cm)
90th 17.4 inches (44.2 cm) 17.2 inches (43.7 cm)
95th 18.4 inches (46.7 cm) 18.2 inches (46.1 cm)

Now you can see that a man with 14 inch arms is somewhere around the 40th percentile. In other words, bigger than about 2 out of 5 guys.

And for women, 14 inch arms puts you in roughly the 60th percentile. That means bigger biceps than about 3 out of 5 girls.

But you probably aren’t having a flex off with an 80-year-old. So here are some charts to help you visualize how big 14 inch arms are based on a normal distribution of arm sizes for people ages 20-59.

14 Inch Arms Men
14 Inch Arms Women

14 Inch Arms by Weight

How much you weigh also determines how big your arms look on your body. For example, 14 inch arms look much bigger on a 150lb guy than a 250lb guy.

In other words, the heavier you are, the bigger your arms need to be to look impressive. Obviously, you want that weight to be muscle, not fat. I’ll get into that in a minute.

14 Inch Arms by Height

Finally, your height also affects how big your arms look.

To illustrate, picture a 5’6” person standing next to a 6’6” person. If they both have 14 inch arms, the short guy’s arms will look much bigger.

So the taller you are, the bigger your arms need to be to look impressive.

Arm Size Calculator

Height, weight, and age make it difficult to know if your arms are considered big. Fortunately, there are equations to predict average arm size based on these variables.

I created a simple calculator that shows you if your arms are big or small for your demographic.  

arm size calculator

Enter the information below to see if your arms are bigger than other people your age and size.

14 Inch Arms by Body Fat Percentage

There are a couple of other factors to consider that are not included in the arms size equation. One of them is your body fat percentage.

Basically, having more muscle and less fat makes your arms appear more prominent. The reason is that you can see the separations between your arm and shoulder. And sometimes even the muscle striations and veins.

In addition, being leaner makes your arms look larger compared to your arm joints (wrist, elbow) and your waist.

For example, below is what I look like when bulking vs cutting. My arms are actually about 16 inches in both pictures, but they clearly look bigger when I’m lean!

16 Inch Arms Bulk vs Cut

I weighed 198lbs on the left and 171lbs on the right, and I’m a little over 5’9″ tall. It shows that your arms will look bigger when you’re lean. I should also note that I had an arm pump in both pictures.

Arm Size Pump vs No Pump

It’s also important to realize that increased blood flow to your arms while working out makes them swell up in size – aka the pump. So measuring your arms right after arm exercises can add 0.5-1″.

For accuracy, it’s best to measure your arms without a pump. That way, you see your true arm size and not just how much volume you did on bicep curls.

Of course, it is fun to occasionally measure your arms with a massive pump to see how big you can get them! But, take the inflated measurement with a grain of salt and know that’s not how big your arms typically are.

Related: How Long Does a Pump Last?

How To Grow Your Arms

Building a big set of arms takes more than just repping out sets of bicep curls. Instead, you need a well-rounded plan, including nutrition, workouts, and a few proven supplements.


Believe it or not, how you eat is more important than how you lift when building muscle. You won’t progress very far in the gym if you don’t give your body what it needs to grow.

First, you need to create a calorie surplus to gain muscle consistently. That means you eat more calories than you burn each day.

Calorie Surplus For Bulking II

Next, you must eat enough protein to give your arms the building blocks to grow new muscle tissue. And don’t listen to that 1 gram of protein per pound of bodyweight bro science!

Your lean mass, activity level, and fitness goal dictate how much protein you need.

Calculate Your Grams of Protein Per Day

Some other nutrition advice I have is to eat mostly clean foods. Skip the dirty bulk and steer towards whole, natural foods for the most quality gains.

Also, tap into nutrient timing to unlock the last 10% of potential arm gains. That means getting most of your carbs and calories around your workout.

bodybuilding meal plan

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To build big arms, you need to train your whole body. That may sound counterintuitive, but compound exercises like squats and deadlifts boost muscle-building hormones that help you build big arms.

Also, your biceps have an inner (short) and outer (long) head. The short head creates size and thickness, while the long head adds to the bicep peak. So include a variety of exercises to hit both bicep heads.

3 Steps to Wider Biceps

16 Inch Arms Outer Bicep Workout

Finally, don’t forget to train your triceps because they make up approximately 2/3 of the area of your arm! Therefore, big triceps make it easier to build 14 inch arms.

Related: 13 Lateral Head Tricep Exercises For Chiseled Arms


As a word of caution, do not expect supplements to miraculously grow your arms in days or weeks. Instead, supplements are only an add-on to proper diet and exercise that may give you a small boost.

In addition, there are a lot of snake oil supplements that cost too much money and don’t deliver results. Here are some proven muscle-building supplements that can help you build bigger arms.

How Long Does It Take to Get 14 Inch Arms?

The time it takes to get 14 inch arms depends on your starting point. For example, if you’re relatively new to training and already have 13 inch arms, you could reach 14 inches in a few months.

On the other hand, it could take you a year or more if you’ve been lifting for a while and need to gain more than an inch of arm size. But don’t get discouraged because 14 inch arms are easily attainable for most people.

How To Build Your Arms Faster

Now you know how 14 inch arms measure up. Once you get there, you’ll probably feel like building 15, 16, or even 17 inch arms!

If you want to grow your arms in weeks instead of months, you must start with a dialed-in muscle gain meal plan. And you can get a personalized, easy-to-follow nutrition plan right here.

Click the image or button below to learn more about Custom Meal Plans for Muscle Growth.

With this information, you’re well on your way to building an impressive pair of arms. And if you liked this article, make sure you check out some of my other helpful content below!

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