How to Determine Your Sports Bra Size?

How to Determine Your Sports Bra Size? A well-fitting sports bra is key to comfortable working out. Here’s a step-by-step guide to make sure you’re getting the most supportive fit.

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Not all women are created equal, especially when it comes to their breasts. This speciality is what makes finding the perfect sports bra so difficult. Even women with small busts can have difficulty finding a comfortable and flattering sports bra. So, how do you determine your sports bra size?

There are a few steps you can take to measure yourself and find the right size. First, you’ll need a soft measuring tape. If you don’t have one, you can use a string or a piece of ribbon and then hold it up to a ruler afterwards. With your tape measure or string, wrap it around the fullest part of your bust. Make sure the tape measure or string is snug but not too tight, and write down this number. This is your bust measurement.

Next, wrap the measuring tape or string around your body just under your bust. Again, make sure it’s snug but not too tight, and write down this number. This is your band size measurement.

Now that you have both of these measurements, it’s time to do some math. Take your band size measurement and add 4 inches (10 cm) to it if you measured an even number, or 5 inches (13 cm) if you measured an odd number. This is your base size measurement.

Next, take your bust measurement and subtract your base size measurement. The difference will determine what cup size you need: 0 inches (0 cm) = AA cup; 1 inch (2 cm) = A cup; 2 inches (5 cm) = B cup; 3 inches (7 cm) = C cup; 4 inches (10 cm) = D cup; 5 inches (13 cm) = DD cup; 6 inches (15 cm) = DDD cup; 7 inches (18 cm)= GGG cup; 8 inches (20 cm)= H cup; 9 inches (+20 cm)= I cup.

Now that you know how to determine your sports bra size, all that’s left to do is find a style that suits you!

How to Measure Your Bra Size

Before you can determine your sports bra size, you need to take some measurements. You will need a soft measuring tape and to be wearing a non-padded bra. With the tape measure, you will need to measure around the chest, just under the arms and above the bust. Make sure the tape measure is level and snug, but not too tight. Take a deep breath in and record this number.

Step 1: Find Your Band Size

In order to find your band size, you will need a soft tape measure. Wrap the soft tape measure around your chest, just under your arms and directly across your bust. Be sure to keep the tape measure level and snug against your body, but not too tight. Round to the nearest whole number. If the number is even, add four inches. If it’s odd, add five. This is your band size.

Step 2: Determine Your Cup Size

To determine your cup size, wrap the measuring tape around your bare chest at the point where your breast tissue reaches its fullest. Be sure to keep the measuring tape level and parallel to the ground. Then, take a deep breath in and exhale before finally letting the measuring tape rest on your skin. Note the measurement in inches or centimeters and round to the nearest whole number.

If you measured in inches, use the following conversion chart to determine your cup size:
-Underbust (in inches) Cup Size
-28″ or less AA
-30″ A
-32″ B
-34″ C
-36″ D
-38″ DD or E
-40″ DDD or F
If you measured in centimeters, use this conversion chart instead:
-Underbust (in centimeters) Cup Size
-71 cm or less AA
-76 cm A
-81 cm B
-86 cm C
89 cm D
94 cm DD or E
99 cm DDD or F

Sports Bra Fitting Tips

ill-fitting sports bras are not only uncomfortable, but they can also lead to pain, chafing, and even breast tissue damage. A properly fitting sports bra will minimize breast movement, support your breasts, and reduce discomfort. To find your perfect size, follow these simple steps.

Check the Band

The band of a sports bra should be snug but not too tight. You should be able to fit two fingers under the band comfortably. If you can’t, the band is too tight. If you can fit more than two fingers, the band is too loose.

The band should also be level with the front of your body. If it rides up in the back, it’s too loose.

Check the Cups

Before you even think about the band, make sure the cups fit. Too often, women choose a sports bra based on the band size only to find that the cups gape or run small. The band should provide 80% of the support, but the cups are just as important.

The cups should hold each breast individually without squishing them together or allowing them to spill over the top or out the sides. There should be no gaping or wrinkling in the fabric, and you shouldn’t be able to fit more than two fingers under the band.

Check the Straps

One of the most important aspects of finding a well-fitting sports bra is making sure that the straps stay in place without digging into your skin or falling down your shoulders. The band should also provide support without being too tight or constrictive. You should be able to take a deep breath without the bra feeling uncomfortably tight. If you need to keep adjusting the straps or band during your workout, it’s likely that the bra isn’t a good fit.


Choosing the right sports bra is essential to any woman’s comfort and support during exercise. With so many different styles and brands on the market, it can be difficult to determine which one is right for you. This guide will help you understand how to correctly measure your bust and determine your sports bra size.

When trying on a sports bra, pay attention to how it feels when you move around. The straps should stay in place, but not dig into your skin. The band should be tight enough to stay in place, but not so tight that it inhibits your breathing. The cups should encapsulate your breasts and prevent them from moving too much during physical activity.

Now that you know how to measure your bust and choose the right sports bra, you’ll be able to find a style that offers both comfort and support during your next workout.

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