How Are Bras Measured?

by | Last updated on January 24, 2024

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Bra sizes are based on your band size (the number) and your cup size (the letter). These measurements are usually determined by

using a tape measure around your rib cage and bust

. The number/letter is your bra size. Finding the right bra size is crucial for the right support and for a smooth comfortable fit.

How do you determine cup size?


Take your bust (usually the bigger number) and subtract your band measurement

. This number corresponds with your cup size. If your bust measurement and band measurement are the same number, you're an AA cup.

How do I measure myself for a bra size?


Stand upright without a bra on, and using a measuring tape, measure around your back and under your bust, where the band of a bra would usually sit

. Make sure the tape is going around in a steady, even line. It should feel snug, but not tight. Measure in inches: if you land at an even number, that is your band size.

Is DD bigger than D?

There is a difference of between 2cm and 2.54cm (depending on where you shop) between each cup size, so an AA is an inch smaller than A and

DD is an inch bigger than D

.

What is difference between 34a and 34B?

Now, here's where things can get a little tricky. For reference, any cup with a 34 band size is considered a “true cup” size. This means that

a 34AA is in fact a AA cup, just as how a 34B is a true B cup

. However, a 34B is also equivalent in cup volume to a 30D, 32C, and a 36A.

What size is 34B bra?

A bra size that's 34B has an

underbust size between 30-31 inches and a bust size between 35-36 inches

. A ‘B' cup is likely to be seen as small since it's only an inch larger than an A cup. For teenagers, a B cup is an average size, and when it comes to adults, it is a smaller size.

How do you measure your bra size online?

Bust/band difference in inches US cup size UK/AU cup size 5 E or DD DD 6 F or DDD E 7 G or DDDD F 8 H FF

Is a DDD the same as an E?

It might seem confusing, but

yes a DDD is the same as an F

—at times they are labeled differently based on the brand. After size D you can either go up to size DD which is the bra size equivalent to size E, size DDD which is equivalent to size F, and size DDDD which is equivalent to size G.

Is 40D the same as 38DD?

40 BAND SIZE Current Bra Size Sister Size DOWN Sister Size UP 40C 38D 42B 40D 38DD(E) 42C 40DD(E) 38DDD(F) 42D

What is Triple D bra size?


A breast measurement 5 inches larger than the band size

is a DD and a breast measurement 6 inches larger than the band size is a DDD.

Is 34B a small or medium?

Size Bra Size Small 36A,34B
Medium

36B,34C, 34D
Large 34DD, 36C, 36D, 38B X-Large 36DD, 38C, 38D, 38DD, 40B

Is 32C bigger than 34B?

Sister sizes

For an example,

a 32C and a 34B are the same cup size

. The only difference is the band size. The 34 is a bigger band size than a 32. Another example, a 34B and 36A are the same cup size.

Is 34C bigger than 34B?

If your band fits but you need a different cup size.

If your band fits great but your cups are too big or too small, keep the band size the same and just adjust the cup size based on your needs. For example,

if you are wearing a 34B bra that fits in the band but has cups that are too small, you should choose a 34C

.

Is 32B and 34B the same?


The physical difference is only in the band size

(34 is bigger than 32). The letter of cups goes bigger with smaller band size (that means 34B and 32B are differenct cups, the second is physically smaller).

Is 36B the same as 34C?


The next sister size to a 34C is a 36B

, which is the new size to try instead. The cups will still be the same size, but the band will be roomier. Here's a breakdown of what to do in a few specific scenarios: Your band fits, but your cups don't: If the cups feel small, go up a cup size.

Is 32B bra size small or medium?

32B is usually considered to be

small

when compared to other B-Cup bras. The band of the 32B bra is also tiny. However, it is still bigger than 30B or 28B. Conversely, 32B is smaller when compared to 32D, 36B and 34B.

Is a size 36 bra big?

36 BAND SIZES 34D 36C 38B 34DD 36D 38C 34DDD 36DD 38D 34F 36DDD 38DD

How much does one DDD breast weigh?

DDD cups usually weigh around 5-6 pounds, which is roughly

2.5-3 pounds

for each breast.

What is 34G equivalent to?

Current Bra Size Sister Size Down Sister Size Up
36FF


34G


38F

36G


34GG


38FF

36GG


34H


38G

36H


34HH


38GG

What is a size F?

UK USA FR, ES, BE 30-32 D/DD 30-32 C/D 80-85 D/E 30-32 E/F 30-32 DD/DDD(E) 80-85 F/G 34-36 A/B 34-36 AA/A 90-95 A/B 34-36 B/C 34-36 A/B 90-95 B/C
Rebecca Patel
Author
Rebecca Patel
Rebecca is a beauty and style expert with over 10 years of experience in the industry. She is a licensed esthetician and has worked with top brands in the beauty industry. Rebecca is passionate about helping people feel confident and beautiful in their own skin, and she uses her expertise to create informative and helpful content that educates readers on the latest trends and techniques in the beauty world.