Buck Mason vs Gildan: which size fits the same?
In tees, a Buck Mason L is closest to a Gildan L (½″ snugger). In long sleeves, a Buck Mason L is closest to a Gildan L (the same around).
Tees
Buck Mason tees measure about 1¾″ more around than Gildan at the same size. A Buck Mason L is closest to a Gildan L (½″ snugger).
| Buck Mason | Chest · length | Closest Gildan | Chest · length | Gildan is |
|---|---|---|---|---|
| Buck Mason XS | 37½″ · 26″ | Gildan M | 39¼″ · 27¾″ | 1¾″ roomier |
| Buck Mason S | 39½″ · 26½″ | Gildan M | 39¼″ · 27¾″ | the same around |
| Buck Mason M | 41½″ · 27″ | Gildan L | 43″ · 28¾″ | 1½″ roomier |
| Buck Mason L | 43½″ · 27½″ | Gildan L | 43″ · 28¾″ | ½″ snugger |
| Buck Mason XL | 46½″ · 28¼″ | Gildan XL | 47″ · 29¾″ | ½″ roomier |
| Buck Mason XXL | 49½″ · 29″ | Gildan XXL | 51″ · 30¾″ | 1½″ 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, Buck Mason Slub Classic Tee. From Gildan: Gildan Heavy Cotton T-Shirt (5000), Gildan Ultra Cotton T-Shirt (2000), Gildan Softstyle T-Shirt (64000), Gildan DryBlend T-Shirt (8000). Relaxed and oversized cuts are left out.
Long sleeves and layers
Buck Mason and Gildan long sleeves measure about the same at the same size (within ¾″ around). A Buck Mason L is closest to a Gildan L (the same around).
| Buck Mason | Chest · length | Closest Gildan | Chest · length | Gildan is |
|---|---|---|---|---|
| Buck Mason XS | 38″ · 25¼″ | Gildan S | 37¼″ · 26½″ | ¾″ snugger |
| Buck Mason S | 39¾″ · 25¾″ | Gildan M | 41¼″ · 27¼″ | 1¼″ roomier |
| Buck Mason M | 41¾″ · 26¼″ | Gildan M | 41¼″ · 27¼″ | ¾″ snugger |
| Buck Mason L | 44¾″ · 27″ | Gildan L | 45″ · 28¼″ | the same around |
| Buck Mason XL | 47¾″ · 27¾″ | Gildan XL | 49″ · 29¼″ | 1¼″ roomier |
| Buck Mason XXL | 50¾″ · 28½″ | Gildan XL | 49″ · 29¼″ | 1¾″ snugger |
From Buck Mason: Buck Mason Field-Spec Sandlot Tee, Buck Mason Field-Spec Rugby Polo, Buck Mason Welterweight Hooded Sweatshirt, Buck Mason Vintage Thermal Henley. From Gildan: Gildan Heavy Cotton Long Sleeve T-Shirt (5400), Gildan Ultra Cotton Long Sleeve T-Shirt (2400), Gildan Heavy Blend Hooded Sweatshirt (18500), Gildan Heavy Blend Crewneck Sweatshirt (18000). Relaxed and oversized cuts are left out.
More: Buck Mason sizing · Gildan 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.