Bonobos vs Polo Ralph Lauren: which size fits the same?
In button-downs, a Bonobos L is closest to a Polo Ralph Lauren M (1½″ snugger).
Button-downs
Polo Ralph Lauren button-downs measure about 2″ more around than Bonobos at the same size. A Bonobos L is closest to a Polo Ralph Lauren M (1½″ snugger).
| Bonobos | Chest · length | Closest Polo Ralph Lauren | Chest · length | Polo Ralph Lauren is |
|---|---|---|---|---|
| Bonobos XS | 37½″ · 28¼″ | Polo Ralph Lauren XS | 39¼″ · 28¾″ | 1¾″ roomier |
| Bonobos S | 40½″ · 29″ | Polo Ralph Lauren XS | 39¼″ · 28¾″ | 1¼″ snugger |
| Bonobos M | 43½″ · 29½″ | Polo Ralph Lauren S | 42¼″ · 29½″ | 1¼″ snugger |
| Bonobos L | 46½″ · 30¼″ | Polo Ralph Lauren M | 45″ · 30¼″ | 1½″ snugger |
| Bonobos XL | 49½″ · 30¾″ | Polo Ralph Lauren L | 48½″ · 31″ | 1″ snugger |
| Bonobos XXL | 52½″ · 31½″ | Polo Ralph Lauren XL | 52″ · 31¾″ | ½″ snugger |
From Bonobos: Bonobos Riviera Short Sleeve Shirt, Standard Fit, Bonobos Riviera Short Sleeve Shirt, Slim Fit, Bonobos Riviera Short Sleeve Shirt, Tailored Fit, Bonobos Riviera Short Sleeve Shirt, Athletic Fit. From Polo Ralph Lauren: Polo Ralph Lauren Classic Fit Tattersall Oxford Shirt. Relaxed and oversized cuts are left out.
More: Bonobos sizing · Polo Ralph Lauren 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.