Buck Mason vs Uniqlo: which size fits the same?
In tees, a Buck Mason L is closest to an Uniqlo L (1″ roomier). In long sleeves, a Buck Mason L is closest to an Uniqlo L (½″ roomier).
Tees
Buck Mason and Uniqlo tees measure about the same at the same size (within ¾″ around). A Buck Mason L is closest to an Uniqlo L (1″ roomier).
| Buck Mason | Chest · length | Closest Uniqlo | Chest · length | Uniqlo is |
|---|---|---|---|---|
| Buck Mason XS | 37½″ · 26¼″ | Uniqlo XS | 37¼″ · 25″ | the same around |
| Buck Mason S | 39½″ · 26¾″ | Uniqlo S | 39¼″ · 26¼″ | the same around |
| Buck Mason M | 41½″ · 27¼″ | Uniqlo M | 41¾″ · 27¼″ | the same around |
| Buck Mason L | 43½″ · 27¾″ | Uniqlo L | 44½″ · 28½″ | 1″ roomier |
| Buck Mason XL | 46½″ · 28½″ | Uniqlo XL | 48″ · 29¼″ | 1½″ roomier |
| Buck Mason XXL | 49½″ · 29¼″ | Uniqlo XXL | 50¾″ · 29½″ | 1¼″ 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 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.
Long sleeves and layers
Buck Mason and Uniqlo long sleeves measure about the same at the same size (within ¾″ around). A Buck Mason L is closest to an Uniqlo L (½″ roomier).
| Buck Mason | Chest · length | Closest Uniqlo | Chest · length | Uniqlo is |
|---|---|---|---|---|
| Buck Mason XS | 39″ · 25¾″ | Uniqlo XS | 39¼″ · 25¼″ | the same around |
| Buck Mason S | 41″ · 26¼″ | Uniqlo S | 41¼″ · 26¼″ | the same around |
| Buck Mason M | 43″ · 26¾″ | Uniqlo M | 43½″ · 27¼″ | ½″ roomier |
| Buck Mason L | 46″ · 27½″ | Uniqlo L | 46½″ · 28½″ | ½″ roomier |
| Buck Mason XL | 49″ · 28¼″ | Uniqlo XL | 50″ · 29¼″ | 1″ roomier |
| Buck Mason XXL | 52″ · 29″ | Uniqlo XXL | 52″ · 29½″ | the same around |
From Buck Mason: Buck Mason Field-Spec Sandlot Tee. From Uniqlo: Uniqlo Waffle T-Shirt | Long Sleeve, Uniqlo AIRism Cotton T-Shirt | Long Sleeve, Uniqlo Waffle Henley Neck T-Shirt | Long Sleeve. Relaxed and oversized cuts are left out.
More: Buck Mason sizing · Uniqlo sizing
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.
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.