| Size | Above Patella Circumference | |
| Small | 11-12 in | 28-30 cm |
| Medium | 13-15 in | 32-39 cm |
| Large | 16-18 in | 40-47 cm |
| X-Large | 19-21 in | 48-54 cm |
| XX-Large | 22-24 in | 55-62 cm |
| XXX-Large | 25-27 in | 63-69 cm |
| XXXX-Large | 27-34 in | 70-86 cm |
| Size | Above Patella Circumference | |
| Small | 11-12 in | 28-30 cm |
| Medium | 13-15 in | 32-39 cm |
| Large | 16-18 in | 40-47 cm |
| X-Large | 19-21 in | 48-54 cm |
| XX-Large | 22-24 in | 55-62 cm |
| XXX-Large | 25-27 in | 63-69 cm |
| XXXX-Large | 27-34 in | 70-86 cm |