34D Bra Size Equivalent

34D Bra Size Equivalent (These Are the Sister Sizes of 34D Bras)

Looking for 34D bra size equivalent? If so, this simply means you should know about sister sizes. Read on for bras that are equivalent to 34D.

34D Bra Size Equivalent

To know 34D bra size equivalent, you should understand sister sizes in bra sizing.

In a nutshell, sister sizes are simply groups of bras that have the same cup volume.  For our case, 34D is equivalent to 30F (DDD), 32E (DD), 36C, and 38B.

If you are confused at this stage, read on to learn how sister sizes are determined.

How to Calculate Your Sister Size

There are two rules you should know to calculate sister sizes:

i) if your band is too loose, go down a band size, but go up a cup size

ii) If your band is too tight, go up a band size but go down a cup size

Check the sister size chart below for reference.

Simply find your current bra size, and the sister sizes will be the ones on the same row (horizontally.  So, for example, if you’re a 34D, your sister sizes are 30D (DDD), 32E (DD), 36C, and 38B. Each row is a family of sister sizes.

Bra Sister Size Chart

Bra Sister Sizes

BAND SIZE CUP SIZE
30 32 34 36 38 40 42 44 46 48
30B 32A 34AA
30C 32B 34A
30C 1/2 32B 1/2 34A 1/2
30D 32C 34B 36A
30D 1/2 32C 1/2 34B 1/2 36A 1/2
30E (DD) 32D 34C 36B 38A
30E 1/2 32D 1/2 34C 1/2 36B 1/2 38A 1/2
30F (DDD) 32E (DD) 34D 36C 38B 40A
32E 1/2 34D 1/2 36C 1/2 38B 1/2 40A 1/2
30G (DDDD) 32F (DDD) 34E (DD) 36D 38C 40B
32G (DDDD) 34F (DDD) 36E (DD) 38D 40C 42B
32H 34G (DDDD) 36F (DDD) 38E (DD) 40D 42C 44B
34H 36G (DDDD) 38F (DDD) 40E (DD) 42D 44C 46B
36H 38G (DDDD) 40F (DDD) 42E (DD) 44D 46C 48B
38H 40G (DDDD) 42F (DDD) 44E(DD) 46D 48C
38I 40H 42G (DDDD) 44F (DDD) 46E(DD) 48D

Best 34D Bra Size Equivalents

Now that you know the 34D bra size equivalent, here are some recommendations of bras that will fit you:

34D Bras

30F (DDD) Bras

32E (DD) Bras

36C Bras

38B Bras

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