Mack Weldon vs Uniqlo: which size fits the same?
In tees, a Mack Weldon L is closest to an Uniqlo M (the same around). In polos, a Mack Weldon L is closest to an Uniqlo L (the same around).
Tees
Uniqlo tees measure about 2¾″ more around than Mack Weldon at the same size. A Mack Weldon L is closest to an Uniqlo M (the same around).
| Mack Weldon | Chest · length | Closest Uniqlo | Chest · length | Uniqlo is |
|---|---|---|---|---|
| Mack Weldon S | 38″ · 28″ | Uniqlo XS | 37¼″ · 25″ | ¾″ snugger |
| Mack Weldon M | 40″ · 29″ | Uniqlo S | 39¼″ · 26¼″ | ¾″ snugger |
| Mack Weldon L | 42″ · 29¾″ | Uniqlo M | 41¾″ · 27¼″ | the same around |
| Mack Weldon XL | 44″ · 30½″ | Uniqlo L | 44½″ · 28½″ | ½″ roomier |
| Mack Weldon XXL | 46″ · 31″ | Uniqlo L | 44½″ · 28½″ | 1½″ snugger |
From Mack Weldon: Mack Weldon SILVER Crew Neck T-Shirt, Mack Weldon Pima Crew Neck T-Shirt, Mack Weldon Pima Short Sleeve Henley. 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
Mack Weldon and Uniqlo polos measure about the same at the same size (within ¾″ around). A Mack Weldon L is closest to an Uniqlo L (the same around).
| Mack Weldon | Chest · length | Closest Uniqlo | Chest · length | Uniqlo is |
|---|---|---|---|---|
| Mack Weldon S | 41″ · 27½″ | Uniqlo S | 40¼″ · 26¼″ | ¾″ snugger |
| Mack Weldon M | 43″ · 28½″ | Uniqlo M | 42¾″ · 27″ | the same around |
| Mack Weldon L | 45½″ · 29¾″ | Uniqlo L | 45½″ · 28¼″ | the same around |
| Mack Weldon XL | 48″ · 30½″ | Uniqlo XL | 48½″ · 29″ | ½″ roomier |
| Mack Weldon XXL | 50″ · 31″ | Uniqlo XXL | 51″ · 29¼″ | 1″ roomier |
From Mack Weldon: Mack Weldon Heavyweight Slub Polo, Mack Weldon SILVER Pique 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: Mack Weldon 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.