Buck Mason vs Champion: which size fits the same?

In tees, a Buck Mason L is closest to a Champion M (1½″ snugger).

Tees

Champion tees measure about 2″ more around than Buck Mason at the same size. A Buck Mason L is closest to a Champion M (1½″ snugger).

Buck MasonChest · lengthClosest ChampionChest · lengthChampion is
Buck Mason XS37½″ · 26¼″Champion S38″ · 27″½″ roomier
Buck Mason S39½″ · 26¾″Champion S38″ · 27″1½″ snugger
Buck Mason M41½″ · 27¼″Champion M42″ · 28¾″½″ roomier
Buck Mason L43½″ · 27¾″Champion M42″ · 28¾″1½″ snugger
Buck Mason XL46½″ · 28½″Champion L46″ · 30¼″½″ snugger
Buck Mason XXL49½″ · 29¼″Champion XL50″ · 31¼″½″ roomier

From Buck Mason: Buck Mason Pima Classic Tee, Buck Mason Slub Curved Hem Tee, Buck Mason Pima Curved Hem Tee, Buck Mason Toughknit Classic Tee, Buck Mason Yuma Hemp Cotton Classic Tee, Buck Mason Field-Spec Cotton Heavy Tee. From Champion: Champion Classic T-Shirt (T425), Champion Heritage Jersey T-Shirt (T105). Relaxed and oversized cuts are left out.

More: Buck Mason sizing · Champion 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.