US Bra Size Chart In Inches and Centimeters

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Determining your American bra size can be very confusing. For starters, most women are wearing a bra that does not properly fit them. Beyond that, different countries use different sizing systems, adding to the confusion.

We have a bra size calculator that you can use to properly size yourself. Once you have the correct measurements, use our US bra size conversion chart to get your breast and band size in inches and centimeters.

Bra Size Chart

Graphic image of a bra size chart in centimeters starting from 30A until 40DD
Bust measurement (in centimeters)
76cm 78cm 80cm 82cm 84cm 86cm 88cm 92cm 94cm 97cm 99cm 102cm 104cm 107cm 109cm 112cm
Band measurement (in centimeters) 61cm 30A 30B 30C 30D
64cm 30A 30B 30C 30D
66cm 30A 30B 30C 30D
68cm 32A 32B 32C 32D 32DD 32DDD
71cm 32A 32B 32C 32D 32DD 32DDD
74cm 34A 34B 34C 34D 34DD 34DDD
76cm 34A 34B 34C 34D 34DD 34DDD
78cm 36A 36B 36C 36D 36DD 36DDD
81cm 36A 36B 36C 36D 36DD 36DDD
84cm 38A 38B 38C 38D 38DD 38DDD
86cm 38A 38B 38C 38D 38DD 38DDD
89cm 40A 40B 40C 40D 40DD
92cm 40A 40B 40C 40D 40DD

A Cup Conversions

An A cup breast is considered to be very small, and is often the bra size worn by teenagers who are still developing.

  • A 30A has a band size of 30 inches and 61 centimeters, and an overbust size of 31 inches and 76 centimeters.
  • A 32A has a band size of 32 inches and 68 centimeters, and an overbust size of 33 inches and 82 centimeters.
  • A 34A has a band size of 34 inches and 74 centimeters, and an overbust size of 35 inches and 86 centimeters.
  • A 36A has a band size of 36 inches and 78 centimeters, and an overbust size of 37 inches and 92 centimeters.
  • A 38A has a band size of 38 inches and 84 centimeters, and an overbust size of 39 inches and 97 centimeters.
  • A 40A has a band size of 40 inches and 89 centimeters, and an overbust size of 41 inches and 102 centimeters.
Bra SizeBand (in)Bust (in)Band (cm)Bust (cm)
30A30in31in61cm76cm
32A32in33in68cm82cm
34A34in35in74cm86cm
36A36in37in78cm92cm
38A38in39in84cm97cm
40A40in41in89cm102cm

B Cup Conversions

A B cup breast is considered small, but close to the average breast size.

  • A 30B has a band size of 30 inches and 61 centimeters, and an overbust size of 32 inches and 78 centimeters.
  • A 32B has a band size of 32 inches and 68 centimeters, and an overbust size of 34 inches and 84 centimeters.
  • A 34B has a band size of 34 inches and 74 centimeters, and an overbust size of 36 inches and 88 centimeters.
  • A 36B has a band size of 36 inches and 78 centimeters, and an overbust size of 38 inches and 94 centimeters.
  • A 38B has a band size of 38 inches and 84 centimeters, and an overbust size of 40 inches and 99 centimeters.
  • A 40B has a band size of 40 inches and 89 centimeters, and an overbust size of 42 inches and 104 centimeters.
Bra SizeBand (in)Bust (in)Band (cm)Bust (cm)
30B30in32in61cm78cm
32B32in34in68cm84cm
34B34in36in74cm88cm
36B36in38in78cm94cm
38B38in40in84cm99cm
40B40in42in89cm104cm

C Cup Conversions

Culturally speaking, the C cup is considered to be the average bra size

  • A 30C has a band size of 30 inches and 61 centimeters, and an overbust size of 33 inches and 80 centimeters.
  • A 32C has a band size of 32 inches and 68 centimeters, and an overbust size of 35 inches and 86 centimeters.
  • A 34C has a band size of 34 inches and 74 centimeters, and an overbust size of 37 inches and 92 centimeters.
  • A 36C has a band size of 36 inches and 78 centimeters, and an overbust size of 39 inches and 97 centimeters.
  • A 38C has a band size of 38 inches and 84 centimeters, and an overbust size of 41 inches and 102 centimeters.
  • A 40C has a band size of 40 inches and 89 centimeters, and an overbust size of 43 inches and 107 centimeters.
Bra SizeBand (in)Bust (in)Band (cm)Bust (cm)
30C30in33in61cm80cm
32C32in35in68cm86cm
34C34in37in74cm92cm
36C36in39in78cm97cm
38C38in41in84cm102cm
40C40in43in89cm107cm

D Cup Conversions

While a D cup breast size is considered large by most cultures, it is actually the average boob size in America. 

  • A 30D has a band size of 30 inches and 61 centimeters, and an overbust size of 34 inches and 82 centimeters.
  • A 32D has a band size of 32 inches and 68 centimeters, and an overbust size of 36 inches and 88 centimeters.
  • A 34D has a band size of 34 inches and 74 centimeters, and an overbust size of 38 inches and 94 centimeters.
  • A 36D has a band size of 36 inches and 78 centimeters, and an overbust size of 40 inches and 99 centimeters.
  • A 38D has a band size of 38 inches and 84 centimeters, and an overbust size of 42 inches and 104 centimeters.
  • A 40D has a band size of 40 inches and 89 centimeters, and an overbust size of 44 inches and 109 centimeters.
Bra SizeBand (in)Bust (in)Band (cm)Bust (cm)
30D30in34in61cm82cm
32D32in36in68cm88cm
34D34in38in74cm94cm
36D36in40in78cm99cm
38D38in42in84cm104cm
40D40in44in89cm109cm

DD Cup Conversions

By all accounts, DD boobs are large. They weigh quite a bit and can cause long term back issues. 

  • A 30DD has a band size of 30 inches and 61 centimeters, and an overbust size of 35 inches and 84 centimeters.
  • A 32DD has a band size of 32 inches and 68 centimeters, and an overbust size of 37 inches and 92 centimeters.
  • A 34DD has a band size of 34 inches and 74 centimeters, and an overbust size of 39 inches and 99 centimeters.
  • A 36DD has a band size of 36 inches and 78 centimeters, and an overbust size of 41 inches and 102 centimeters.
  • A 38DD has a band size of 38 inches and 84 centimeters, and an overbust size of 43 inches and 107 centimeters.
  • A 40DD has a band size of 40 inches and 89 centimeters, and an overbust size of 45 inches and 112 centimeters.
Bra SizeBand (in)Bust (in)Band (cm)Bust (cm)
30DD30in35in61cm84cm
32DD32in37in68cm92cm
34DD34in39in74cm99cm
36DD36in41in78cm102cm
38DD38in43in84cm107cm
40DD40in45in89cm112cm
   

Hi there, I’m Allena, Founder and Editor of The Better Fit. I’ve always had a passion for finding ways to help women improve various areas of their lives. I have researched and worked to create this website so women would have a place to come and be informed about an article of clothing they literally wear every day.