Does Nike run big or small?

Nike tees run true to size, within ¾″ of other brands at the same size. Nike polos run big, about 1½″ roomier around than other brands at the same size.

Tees: true to size, within ¾″ of other brands at the same size

SizeNike chest · lengthOther brands (typical)Nike is
XS33¼″ · 26″37¼″ · 26″4″ snugger
S37¾″ · 27½″38″ · 27″the same around
M40½″ · 27½″40¾″ · 27¾″the same around
L44¼″ · 28¾″43½″ · 28¾″¾″ roomier
XL48¼″ · 29½″47″ · 29½″1¼″ roomier
XXL52″ · 30¼″50½″ · 30″1½″ roomier
3XL56″ · 31″55″ · 31¾″1″ roomier

Nike tees here: Nike Team rLegend Tee, Nike Legend Tee, Nike Core Cotton Tee. Compared with 38 tees from other brands.

Polos: big, about 1½″ roomier around than other brands at the same size

SizeNike chest · lengthOther brands (typical)Nike is
XS37″ · 28¾″37¾″ · 25¾″¾″ snugger
S40¼″ · 29¼″40″ · 28¼″the same around
M43¼″ · 29½″42¼″ · 29″1″ roomier
L46½″ · 30¼″45¼″ · 29¾″1¼″ roomier
XL50½″ · 31½″48¼″ · 30½″2¼″ roomier
XXL54½″ · 32¾″51½″ · 31″3″ roomier
3XL58¼″ · 34″55½″ · 33″2¾″ roomier

Nike polos here: 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. Compared with 20 polos from other brands.

Nike compared with

adidas · Buck Mason · Champion · Everlane · Hanes · J.Crew · Mack Weldon · Polo Ralph Lauren · TravisMathew · Under Armour · Uniqlo

Get your exact size in any of these

Add three shirts you own that fit well. FitCard compares their real measurements with every shirt here and tells you the one size to buy, and why, in terms of your own shirts. Free, no tape measure.

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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.