Under Tri Briefs Size Chart
| Size | Waist |
| XS | 26in – 28in |
| S | 28in – 31in |
| M | 31in – 33in |
| L | 34in – 37in |
| XL | 38in – 40in |
| Size | Waist |
| XS | 66cm – 71cm |
| S | 71cm – 79cm |
| M | 79cm – 84cm |
| L | 86cm – 94cm |
| XL | 96cm –102cm |
Sign up for our monthly newsletter to access our membership club and receive exclusive discounts.