| US Size | Chest Size for Jacket | Lower Waist for Pants | Inside Leg |
| 36 | 38" | 33.5" | 32.5" |
| 38 | 40" | 34.5" | 33" |
| 40 | 41.5" | 35" | 33.5" |
| 42 | 43" | 36" | 34" |
| 44 | 44.5" | 37.5" | 34.5" |
| 46 | 46.5" | 39" | 34.5" |
| 48 | 48.5" | 41" | 35" |
| 50 | 51" | 43" | 35" |
| 52 | 53" | 44.5" | 35" |
| PLEASE NOTE: OppoSuits have a slim-fit design. When in doubt between two sizes, we recommend you to pick the larger size of the two. | |||
| If your chest size falls into a different size category compared to your waist, all you need to do is select the jacket sizing you require. The trousers are ready to go in their stated size but if you need them taken in or need a little extra added, the design allows for a tailor to adjust the waistband and side seams 2 sizes either way. | |||