Sports Bra Size Guide
Use the chart below to convert your bra size to your New Balance alpha size (XS-XXL) or split alpha size (XS A-C thru XXL D-DD).
Don’t know your bra size? Use your measurements instead.
Find your underbust measurement by wrapping a measuring tape underneath your bust where your bra band usually sits. Your underbust measurement will correspond with "Band Size."
Find your overbust measurement by wrapping a measuring tape over your bust at the widest part.
Find your alpha size by matching your band size with your overbust measurement in the chart below.
| Underbust Measurement | 25"-26" | 27"-28" | 29"-30" | 31"-32" | 33"-34" | 35"-36" | 37"-38" | 39"-40" |
|---|---|---|---|---|---|---|---|---|
| Band Size | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
| A | 30.3" - 31.1" 30A XS XS (A-C) |
32.3" - 33.1" 32A S S (A-C) |
34.3" - 35.0" 34A S S (A-C) |
36.2" - 37.0" 36A M M (A-C) |
38.2" - 39.0" 38A L L (A-C) |
40.2" - 40.9" 42A XL XL (A-C) |
42.1" - 42.9" 42A XL XL (A-C) |
44.1" - 44.9" 44A XXL XXL (A-C) |
| B | 31.1" - 31.9" 30B XS XS (A-C) |
33.1" - 33.9" 32B S S (A-C) |
35" - 35.8" 34B S S (A-C) |
37.0" - 37.8" 36B M M (A-C) |
39.0" - 39.8" 38B L L (A-C) |
40.9" - 41.7" 40B XL XL (A-C) |
42.9" - 43.7" 42B XL XL (A-C) |
44.9" - 45.7" 44B XXL XXL (A-C) |
| C | 31.9" - 32.7" 30C XS XS (A-C) |
33.9" - 34.6" 32C S S (A-C) |
35.8" - 36.6" 34C M M (A-C) |
37.8" - 38.6" 36C L L (A-C) |
39.8" - 40.6" 38C L L (A-C) |
41.7" - 42.5" 40C XL XL (A-C) |
43.7" - 44.5" 42C XL XL (A-C) |
45.7" - 46.5" 44C XXL XXL (A-C) |
| D | 32.7" - 33.5" 30D S S (D-DD) |
34.6" - 35.4" 32D S S (D-DD) |
36.6" - 37.4" 34D M M (D-DD) |
38.6" - 39.4" 36D L L (D-DD) |
40.6" - 41.3" 38D XL XL (D-DD) |
42.5" - 43.3" 40D XL XL (D-DD) |
44.5" - 45.3" 42D XXL XXL (D-DD) |
|
| DD | 33.5" - 34.3" 30DD S S (D-DD) |
35.4" - 36.2" 32DD M M (D-DD) |
37.4" - 38.2" 34DD M M (D-DD) |
39.4" - 40.2" 36DD L L (D-DD) |
41.3" - 42.1" 38DD XL XL (D-DD) |
43.3" - 44.1" 40DD XL XL (D-DD) |
45.3" - 46.1" 42DD XXL XXL (D-DD) |