There is a 1 lb allowance for all divisions. FSO reserves the right to combine weight classes if there are not enough competitors to form a competitive bracket.
Kids
Kids weight classes will be combined by age or weight depending on bracket sizes. Sign your child up in their specific age, weight, and experience level. Adjustments will be made after registration closes to form fair, competitive brackets.
| Class | Weight Range |
| -55 | Under 55 lbs |
| -65 | 53 – 65 lbs |
| -80 | 66 – 80 lbs |
| -95 | 81 – 95 lbs |
| -115 | 96 – 115 lbs |
| -135 | 116 – 135 lbs |
| +135 | Over 135 lbs |
Men's
| Class | Name | Weight Range |
| -140 | Featherweight | Up to 140.0 lbs |
| -155 | Lightweight | 141.0 – 155.0 lbs |
| -170 | Welterweight | 156.0 – 170.0 lbs |
| -185 | Middleweight | 171.0 – 185.0 lbs |
| -205 | Light Heavyweight | 186.0 – 205.0 lbs |
| +205 | Heavyweight | 206.0 lbs and over |
Women's
| Class | Name | Weight Range |
| -125 | Bantamweight | Up to 125.0 lbs |
| -140 | Featherweight | 126.0 – 140.0 lbs |
| -155 | Lightweight | 141.0 – 155.0 lbs |
| -170 | Welterweight | 156.0 – 170.0 lbs |
| +170 | Middleweight | 171.0 lbs and over |