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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).

View Size Guide

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."

Bra sizechart table

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.

Bra size chart
Bra size legend
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"
34E
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)