Under Armour

Size Guide

Men's

Men's Tops

How to Measure

Mens Tops Measurement Locations

CHEST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.

WAIST: Measure around your natural waistline—right above your hips. Be careful not to squeeze too tight to allow a little give.

Size Chest Waist
SM 34″–36″ 28½″–30″
MD 38″–40″ 31½″–33½″
LG 42″–44″ 35″–37″
XL 46″–48″ 39″–41″
XXL 50″–52″ 43″–45½″
3XL 54″–56″ 47½″–50″
4XL 58″–60″ 52″–54½″

Men's Bottoms

How to Measure

Mens Bottoms Measurement Locations

WAIST: Measure around your natural waistline—right above your hips. Be careful not to squeeze too tight to allow a little give.

Size Waist
SM 28″–29″
MD 30″–32″
LG 34″–36″
XL 38″–40″
XXL 42″–44″
3XL 44″–46″
4XL 46″–48″

Men's Fit Guide

Loose
mens loose top
Fuller cut for complete comfort, total range of motion & greater breathability.
Fitted
mens loose top
A slimmer, athletic cut that allows total mobility but eliminates the bulk of extra fabric.
Compression
mens loose top
Ultra-tight, second-skin fit that keeps you locked in & makes you feel like you can do anything.

Women's

Women's Tops

How to Measure

Womens Tops Measurement Locations

BUST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.

WAIST: Measure around your natural waistline—right where your hips start. Be careful not to squeeze too tight to allow a little give.

US Sizes Bust Waist
XS 0–2 32½″–33½″ 25½″–26½″
SM 4–6 33½″–35½″ 27½″–28½″
MD 8–10 36½″–37½″ 29½″–30½″
LG 12–14 39″–40½″ 32″–33½″
XL 16 42″–43½″ 35″–36½″
XXL 18 45″–46½″ 38″–39½″

Women's Bottoms

How to Measure

Womens Bottoms Measurement Locations

WAIST: Measure around your natural waistline—right where your hips start. Be careful not to squeeze too tight to allow a little give.

HIPS: With your feet together, measure around the fullest part of your hips to ensure you'll have enough room to move comfortably.

US Sizes Waist Hips
XS 0–2 23″–25″ 33″–35″
SM 4–6 25½″–27½″ 35½″–37½″
MD 8–10 28″–30″ 38″–40″
LG 12–14 30½″–32½″ 40½″–42½″
XL 16 33″–35″ 43″–45″
XXL 18 36″–38″ 46″–48″

Women's Fit Guide

Loose
mens loose top
Fuller cut for complete comfort, total range of motion & greater breathability.
Fitted
mens loose top
A slimmer, athletic cut that allows total mobility but eliminates the bulk of extra fabric.
Semi-Fitted
mens loose top
A slimmer, athletic cut that delivers optimal mobility by eliminating the bulk of extra fabric.
Compression
mens loose top
Ultra-tight, second-skin fit that keeps you locked in & makes you feel like you can do anything.

Boy's

Boy's Sizes

How to Measure

Boy's Measurement Locations

CHEST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.

WAIST: Measure around your natural waistline-right above your hips. Be careful not to squeeze too tight to allow a little give.

Boys US Sizes Chest Waist Height
YXS 6–6X 24″–25″ 23″–23½″ 46″–48½″
YSM 7–8 25½″–26½″ 23½″–24½″ 50″–54″
YMD 10–12 27½″–28½″ 25½″–26½″ 55½″–58½″
YLG 14–16 30½″–32″ 28″–29½″ 61½″–64″
YXL 18–20 33½″–35″ 31″–32½″ 66½″–69″

Little Boy's Sizes

How to Measure

Boy's Measurement Locations

CHEST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.

WAIST: Measure around your natural waistline—right where your hips start. Be careful not to squeeze too tight to allow a little give.

US Sizes Chest Waist Height
4 21½″–22½″ 21¼″–22½″ 38″–41″
5 22½″–23½″ 22″–23″ 41″–44″
6 23½″–24½″ 22½″–23½″ 44″–46½″
7 24½″–26″ 23″–24″ 46½″–50″

Boy's Fit Guide

Loose
mens loose top
Full, loose fit for enhanced range of motion & breathable comfort no matter where your workout takes you.
Fitted
mens loose top
Sits close to the skin for a streamlined fit without the squeeze of compression.

Girl's

Girls's Sizes

How to Measure

Girl's Measurement Locations

CHEST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.

WAIST: Measure around your natural waistline-right above your hips. Be careful not to squeeze too tight to allow a little give.

Girls US Sizes Chest Waist Height
YXS 6–6X 24″–25″ 23″–23½″ 46″–48½″
YSM 7–8 26″–27″ 23½″–24½″ 50½″–52½″
YMD 10–12 28½″–30″ 25″–26″ 55″–58″
YLG 14–16 31½″–33½″ 28″–30″ 61″–62½″
YXL 18–20 35½″–37½″ 32″–34″ 62½″

Little Girl's Sizes

How to Measure

Girl's Measurement Locations

CHEST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.

WAIST: Measure around your natural waistline—right where your hips start. Be careful not to squeeze too tight to allow a little give.

US Sizes Chest Waist Height
4 21½″–22½″ 21¼″–22½″ 38″–41″
5 22½″–23½″ 22″–23″ 41″–44″
6 23½″–24½″ 22½″–23½″ 44″–46½″
6x 24½″–25″ 23″–23½″ 46½″–48½″

Girls's Fit Guide

Loose
mens loose top
Full, loose fit for enhanced range of motion & breathable comfort no matter where your workout takes you.
Fitted
mens loose top
Sits close to the skin for a streamlined fit without the squeeze of compression.

Toddlers/Infant

Toddler

US Sizes Chest Waist Height Weight
2T 20″–21″ 20½″–21½″ 33″–35″ 29 lbs–33 lbs
3T 20½″–21½″ 21″–22″ 35″–38″ 32 lbs–36 lbs
4T 21½″–22½″ 21½″–22½″ 41″–44″ 38 lbs–42 lbs
5T 22½″–23½″ 22″–23″ 41″–44″ 38 lbs–42 lbs

Infant

US Sizes Chest Height Weight
0–3 M 15½″–17″ 20½″–24″ 8 lbs–12 lbs
3–6 M 17″–18″ 24″–27″ 12lbs–16lbs
6–9 M 18″–18½″ 27″–29″ 16 lbs–20 lbs
12 M 18½″–19″ 29″–30½″ 18 lbs–22 lbs
18 M 19″–20″ 30½″–33″ 22 lbs–26 lbs
24 M 20″–21″ 33″–35″ 26 lbs–30 lbs

Headwear

How to Measure

Hat Measurement Locations

HEAD: To figure out your UA fitted hat size, measure the circumference of your head where your hat will rest. If you don't have a tape measure, use a string and measure it against a ruler. Find your measurement on the size chart to determine your ideal UA hat size.

Adjustable Cap Size

Size Head
Men's OSFA 22-23½
Women's OSFA 21¼-22¾
Youth OSFA 20⅞-22⅜

Stretch-Fit

Size Head
S/M 20⅞″–21½″
M/L 22″–23″
L/XL 23″–24¼″
XL/XXL 24¼″–25½″