Women’s size guide

Men’s size guide

All gender size guide

Women’s shoes

We recommend ordering Brooks running shoes 1/2 to one size larger than your dress shoe. Check out our size chart and fit tips below. You can also get started with our shoe finder

Run Bras

Questions about bras for running? We’ve got you covered. Check out our size chart, fit tips, and measuring guide below. You can also get started with our bra finder

Women's tops

Questions about tops for running? We’ve got you covered. Check out our size chart, fit tips, and measuring guide below.

Women's bottoms

Questions about bottoms for running? We’ve got you covered. Check out our size chart, fit tips, and measuring guide below.

Women's socks

Questions about socks for running? We’ve got you covered. Check out our size chart and measuring guide below.

Women's accessories

Questions about accessories for running? We’ve got you covered. Check out our size chart and measuring guide below.

Check out our 3 Fit Fundementals:

woman in bra highlighting bottom band
1. Check the bottom band

Make sure the bottom band is snug and lies flat across your back — not riding up or loose around your rib cage.

woman in bra with bra cups illustrated
2. Then check the cups

The cups should fit smoothly — spilling out the sides or front means the cup size is too small, while extra space means the cups are too big.

woman in bra highlighting straps
3. Last thing: the straps

Straps should lie smoothly against your skin, without sliding around or digging uncomfortably into your skin.

You can also shop for your sister size

Sister sizes are bra sizes that are not your true cup or band sizes, but they are equivalents. For example, the sister sizes of a 36D include 34DD and 38C. This makes shopping easier and can help you find the right bra that fits you best. Continue on to the size chart below to find your sister size.

photo of two women with numbers identifying the parts of the body needing to be measured to ensure a good bra fit
You’ll need a flexible tape measure. It’s also best to wear a bra that doesn’t change your shape — no padding or compression. You can also just skip the bra.
  1. 1. Measure your rib cage
    Start your measurements by finding your band size. Measure around your rib cage where the bottom band would sit. The tape measure should feel quite snug. If you get a fraction, round down to the nearest inch. Using this chart, find your corresponding band size based on your measurement.
  2. 2. Measure your bust
    Next, find your cup size. Measure around the fullest part of your boobs — which may not be the center — and round up to the nearest inch. Then subtract your rib cage measurement. The difference in inches is your suggested cup size. If you get a fraction, round up to the larger size.

Calculate your bra size:

Not sure of your measurements? Check out our how to measure section above.

Calculate your bra size:

Not sure of your measurements? Check out our how to measure section above.

Find your alpha size (XS-XXL):

A B C D
30 XS XS XS S
32 S S S M
34 M M M L
36 L L L XL
38 XL XL XL XXL
40 XXL XXL XXL

Find your alpha size (XS-XXL):

A B C D
65 XS XS XS S
70 S S S M
75 M M M L
80 L L L XL
85 XL XL XL XXL
90 XXL XXL XXL

Trova la tua taglia alfa (XS-XXL):

A B C D
1 XS XS XS S
2 S S S M
3 M M M L
4 L L L XL
5 XL XL XL XXL
6 XXL XXL XXL

Encuentra tu talla alfa (XS a XXL):

A B C D
80 XS XS XS S
85 S S S M
90 M M M L
95 L L L XL
100 XL XL XL XXL
105 XXL XXL XXL

Découvre ta taille alpha (XS-XXL) :

A B C D
80 XS XS XS S
85 S S S M
90 M M M L
95 L L L XL
100 XL XL XL XXL
105 XXL XXL XXL

Finde deine Alpha-Größe (XS-XXL):

A B C D
30 XS XS XS S
32 S S S M
34 M M M L
36 L L L XL
38 XL XL XL XXL
40 XXL XXL XXL

Find your alpha size (XS-XXL):

A B C D
8 XS XS XS S
10 S S S M
12 M M M L
14 L L L XL
16 XL XL XL XXL
18 XXL XXL XXL

Men’s shoes

We recommend ordering Brooks running shoes 1/2 to one size larger than your dress shoe. Check out our size chart and fit tips below. You can also get started with our shoe finder

Men’s tops

Questions about tops for running? We've got you covered. Check out our size chart, fit tips, and measuring guide below.

Men's bottoms

Questions about bottoms for running? We’ve got you covered. Check out our size chart, fit tips, and measuring guide below.

Men's socks

Questions about socks for running? We’ve got you covered. Check out our size chart and measuring guide below.

Men's accessories

Questions about accessories for running? We’ve got you covered. Check out our size chart and measuring guide below.

All gender shoes

We recommend ordering Brooks running shoes 1/2 to one size larger than your dress shoe. Check out our size chart and fit tips below. You can also get started with our shoe finder

To convert shoe sizes: All gender ("unisex") sizes match men’s sizes per industry standard. If you prefer to convert between men’s and women’s shoes, take the women’s size and subtract 1.5 to find the men’s size. For example, a women’s size 8.5 is a men’s size 7.

All gender socks

Questions about socks for running? We’ve got you covered. Check out our size chart and measuring guide below.

All gender accessories

Questions about accessories for running? We’ve got you covered. Check out our size chart and measuring guide below.