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Under Armour Women’s Size Chart

In Under Armour women’s tops, SM fits a 33.5–36″ bust, MD fits 36–38″ and LG fits 38–41″. Enter your measurements and we’ll call it when you’re between two sizes. The chart it’s based on is right below, checked against the official Under Armour size guide on 27 Oct 2026.

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Fit:
Body measurements, in inches.
Size BustWaist
XXS 31–32.5 24.5–25.5
XS 32.5–33.5 25.5–27
SM 33.5–36 27–29
MD 36–38 29–31
LG 38–41 31–34
XL 41–44 34–37
XXL 44–47 37–40
3XL 47–50 40–43
How we sized thissized by bust
  • Sold as letter sizes (XXS–3X). If your product’s size options look different, use the tab that matches them.
  • One Under Armour chart covers every women’s top — tees, tanks, polos, hoodies, quarter-zips and jackets (all 423 we read print it) — sized by bust with waist as a check. UA prints a dress size beside each letter (SM = 4–6); the letter is the size you buy.
  • Plus sizes 1X–3X are their own products, all in UA’s outlet when we checked, on the same chart. They overlap XXL and 3XL, so we start from the regular run and move to plus where your waist fits it better or your bust runs past 3XL. A few products list a 4XL, past UA’s chart (it ends at 3XL), so we can’t size it.
  • A few tops come in Tall (MDT and up): the same size, about 2″ longer. UA’s unisex tops — its UNLESS collaboration hoodies, crews and tees and two collegiate jerseys — use UA’s men’s chest chart (a unisex MD fits a 37–41″ chest; their size guide misprints it), and sports bras have their own bra-size chart, which we don’t cover.
Source & accuracy checked 27 Oct 2026

Source: official Under Armour size guide

Last checked: 27 Oct 2026

These are body measurements — measure your own body, not a garment you own.

SizeSimply is an independent tool — not affiliated with, endorsed by, or sponsored by Under Armour.

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