| Average children's sizing | Youth Medium: 8/9 yr old | Youth Large: 10/11 yr old | Adult Small: 12-14 yr old |
| Size | Chest Width | Body Length |
| Youth Medium | 18" (45.72cm) | 23" (58.42cm) |
| Youth Large | 20" (50.8cm) | 25" (63.5cm) |
| Adult Small | 20" (50.8cm) | 27" (68.58cm) |
| Adult Medium | 22" (55.88cm) | 28" (71.12cm) |
| Adult Large | 24" (60.96cm) | 29" (73.66cm) |
| Adult XL | 26" (66.04cm) | 30" (76.2cm) |