Nike vs Uniqlo: which size fits the same?

In tees, a Nike L is closest to an Uniqlo L (the same around). In polos, a Nike L is closest to an Uniqlo L (1″ snugger).

Tees

Nike and Uniqlo tees measure about the same at the same size (within ¾″ around). A Nike L is closest to an Uniqlo L (the same around).

NikeChest · lengthClosest UniqloChest · lengthUniqlo is
Nike XS33¼″ · 26″none close
Nike S37¾″ · 27½″Uniqlo XS37¼″ · 25″½″ snugger
Nike M40½″ · 27½″Uniqlo M41¾″ · 27¼″1″ roomier
Nike L44¼″ · 28¾″Uniqlo L44½″ · 28½″the same around
Nike XL48¼″ · 29½″Uniqlo XL48″ · 29¼″the same around
Nike XXL52″ · 30¼″Uniqlo XXL50¾″ · 29½″1¼″ snugger
Nike 3XL56″ · 31″none close

From Nike: Nike Team rLegend Tee, Nike Legend Tee, Nike Core Cotton Tee. From Uniqlo: Uniqlo AIRism Cotton Crew Neck T-Shirt, Uniqlo AIRism T-Shirt, Uniqlo SUPIMA Cotton T-Shirt, Uniqlo DRY-EX T-Shirt, Uniqlo DRY Color T-Shirt, Uniqlo DRY Waffle Henley T-Shirt. Relaxed and oversized cuts are left out.

Polos

Nike polos measure about 1½″ more around than Uniqlo at the same size. A Nike L is closest to an Uniqlo L (1″ snugger).

NikeChest · lengthClosest UniqloChest · lengthUniqlo is
Nike XS37″ · 28¾″Uniqlo XS37¾″ · 25″¾″ roomier
Nike S40¼″ · 29¼″Uniqlo S40¼″ · 26¼″the same around
Nike M43¼″ · 29½″Uniqlo M42¾″ · 27″½″ snugger
Nike L46½″ · 30¼″Uniqlo L45½″ · 28¼″1″ snugger
Nike XL50½″ · 31½″Uniqlo XXL51″ · 29¼″½″ roomier
Nike XXL54½″ · 32¾″Uniqlo 3XL54″ · 30″½″ snugger
Nike 3XL58¼″ · 34″none close

From Nike: Nike Dri-FIT Micro Pique 2.0 Polo, Nike Dri-FIT Victory Solid Polo, Nike Dri-FIT Legacy Polo, Nike Dri-FIT Vertical Mesh Polo, Nike Dry Essential Solid Polo. From Uniqlo: Uniqlo DRY-EX Polo Shirt, Uniqlo AIRism Cotton Pique Polo Shirt, Uniqlo DRY Pique Polo Shirt. Relaxed and oversized cuts are left out.

More: Nike sizing · Uniqlo sizing

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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.