Nike Sports Bras Size Guide

Women’s Sports Bra Size Guide

Alpha Size	XS	S	M	L	XL
Band / Cup Size	30A – 30E 32A – 32B	32C – 32E 34A – 34C	34D – 34E 36A – 36C	36D – 36E 38A – 38C	38D – 38E 40A – 40C

To get the best fit within our Alpha/Cup size range, find your usual size (XS–4X), then find your usual cup size (A–G). For example, if you typically wear a size Medium and are a C cup, the “M (C–E)” should be your perfect size.

Cup size options: A, B, C, D, E (DD), F (DDD), and G (DDDD).

First, Measure Your Underbust

Measure around the bra’s bottom band, just under the breast. The tape measure should feel snug. Round up to the closest measurement. If you don’t have a measuring tape, use a string and a ruler. Follow the above instructions. Lay the string on a flat surface and measure with the ruler.

Second, Measure Your Cup

With the tape measure parallel to the floor, lay the tape across the fullest point of your breast. Measure from the center of your chest to where your breast tissue ends on one side (where an underwire should sit). Round up to the closest measurement.

Three Tips for Finding the Right Fit

1. Check the Straps

If the underband stays put when you raise your arms, you’re good to go. It should sit level on your ribs with enough room for two fingers underneath. Straps should feel secure and barely-there—no digging or slipping.

2. Check the Band

Make sure the fabric’s got you fully covered without gaping, bulging, or you know, squishing the girls.

3. Test the Support

Do five jumping jacks (or any move you’d normally do in a workout). Too much bounce? Go for a higher-support style, a wider strap or a trusty racerback.