Does adidas run big or small?

adidas polos run big, about ¾″ roomier around than other brands at the same size.

Polos: big, about ¾″ roomier around than other brands at the same size

Sizeadidas chest · lengthOther brands (typical)adidas is
XS37¾″ · 28″37″ · 27″¾″ roomier
S40¼″ · 28¾″40″ · 28¼″the same around
M43½″ · 29½″42¾″ · 29″¾″ roomier
L46½″ · 30½″45¾″ · 29¾″¾″ roomier
XL49¾″ · 31¼″48¾″ · 30¾″1″ roomier
XXL53½″ · 32″52″ · 32″1½″ roomier
3XL57½″ · 33″56¾″ · 33¼″¾″ roomier

adidas polos here: adidas Ultimate365 Solid Polo (A514), adidas Performance Polo (A230), adidas Performance Piqué Polo (A430). Compared with 22 polos from other brands.

adidas compared with

J.Crew · Mack Weldon · Nike · Polo Ralph Lauren · TravisMathew · Under Armour · Uniqlo

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Garment measurements: the shirt itself, chest all the way around and length from shoulder to hem, from each brand's own chart or wholesale spec sheet, checked November 2026. Shirts with half or more cotton are shown as they come out of a dryer (about 2% less around and 4% shorter). Brands change their cuts, so check the shop's chart before you buy.