US bra sizes
US bra sizes pair an even-numbered band label, shown on a tag, with a cup letter; published charts list bands from 28 to 60 and assign the cup from the difference between bust and band under the underbust method.
US bands, 28 to 60
Each rung is one band label. A band label is a tag number, not a body measurement.
US/UK 28
US 28UK 28
US/UK 30
US 30UK 30
US/UK 32
US 32UK 32
US/UK 34
US 34UK 34
US/UK 36
US 36UK 36
US/UK 38
US 38UK 38
US/UK 40
US 40UK 40
US/UK 42
US 42UK 42
US/UK 44
US 44UK 44
US/UK 46
US 46UK 46
US/UK 48
US 48UK 48
US/UK 50
US 50UK 50
US/UK 52
US 52UK 52
US/UK 54
US 54UK 54
US/UK 56
US 56UK 56
US/UK 58
US 58UK 58
US/UK 60
US 60UK 60
US band labels beside the other systems
| US / UK | EU | FR/BE | AU/NZ | JP |
|---|---|---|---|---|
| 28 | 60 | 75 | 6 | 60 |
| 30 | 65 | 80 | 8 | 65 |
| 32 | 70 | 85 | 10 | 70 |
| 34 | 75 | 90 | 12 | 75 |
| 36 | 80 | 95 | 14 | 80 |
| 38 | 85 | 100 | 16 | 85 |
| 40 | 90 | 105 | 18 | 90 |
| 42 | 95 | 110 | 20 | 95 |
| 44 | 100 | 115 | 22 | 100 |
| 46 | 105 | 120 | 24 | 105 |
| 48 | 110 | 125 | 26 | 110 |
| 50 | 115 | 130 | 28 | 115 |
| 52 | 120 | 135 | 30 | 120 |
| 54 | 125 | 140 | 32 | 125 |
| 56 | 130 | 145 | 34 | 130 |
| 58 | 135 | 150 | 36 | 135 |
| 60 | 140 | 155 | 38 | 140 |
US cup letters
Cup letters by the difference between bust and band, with the notes where sources disagree.
| Difference (in) | Difference (cm) | US |
|---|---|---|
| 0 | 0 | AA |
| 1 | 2.5 | A |
| 2 | 5.1 | B |
| 3 | 7.6 | C |
| 4 | 10.2 | D |
| 5 | 12.7 | DD/E |
| 6 | 15.2 | DDD/F |
| 7 | 17.8 | DDDD/G |
| 8 | 20.3 | H |
| 9 | 22.9 | I |
| 10 | 25.4 | J |
| 11 | 27.9 | K |
| 12 | 30.5 | L |
| 13 | 33 | M |
| 14 | 35.6 | N |
| 15 | 38.1 | O |
US letters from DD upward are written in several ways: DD/E, DDD/F and DDDD/G, and some US brands use other sequences.
10 US cup letters, one page each
The letters this system writes, each with its own page.
US band labels run from 28 to 60 in steps of two inches. Under the underbust method, the tag band is the underbust rounded to the nearest even number of inches, with an exact odd whole number going up. The listed US band labels match the UK band labels at each step, so the same band number appears in both systems. A band label is the tag label, while underbust is the measurement used to find it.
US cup letters begin with AA for a difference of less than 1 in, then continue through A, B, C and D. The listed sequence pairs DD with E, DDD with F, and DDDD with G, before continuing with H, I, J, K, L, M, N and O. The listed differences run from less than 1 in through 15 in; other differences are not listed. Some US tags show a paired cup label, such as DD/E at 5 in, DDD/F at 6 in, and DDDD/G at 7 in.
Published charts can print US cups with paired letters, while some example tags have the same label in US and UK notation. The example tags include 32A, 34B and 36C, which keep those labels in both systems. Another example is 34DD/E in US notation, shown as 34DD in UK notation. These examples illustrate the labels used in this system and how the listed tags correspond across the two systems.
Questions
What is a US 34 band in US sizing?
A US 34 band is US 34 and UK 34.
Which cup letter is a difference of 6 in in US sizing?
A bust 6 in above the band is US DDD/F.
Do US sizes vary between brands?
US letters from DD upward are written in several ways: DD/E, DDD/F and DDDD/G, and some US brands use other sequences. Treat any chart as a starting point and compare it with the size guide of the brand you are buying.