MMA Shin Guard Sizing
USES / SIZING / FIT
Built for precision. ONX Leg Armor is custom-sized by both shin length and foot length to deliver locked-in stability, full-coverage protection, and uncompromising comfort. Measure carefully to find your perfect fit.
Shin Guard Sizing Chart
Measure from the bottom of your knee to the top of your ankle.
| Leg Armor Shin Size | Shin Length |
| Small | 12" |
| Medium | 13" |
| Large | 14" |
| X-Large | 15"+ |
| Leg Armor Foot Size | Foot Length |
| Small | 9" - 9 5/8" |
| Medium | 9 3/4" - 10 1/4" |
| Large | 10 7/16" - 11" |
| X-Large | 11 1/8" - 11 5/8" |
Why Proper Sizing Matters
Wearing shin guards that don’t fit correctly is almost as bad as not wearing any at all. If they’re too loose, they’ll slip or rotate during kicks and checks, leaving parts of your shin or instep exposed. Too tight, and they can restrict circulation or limit mobility. Improper fit = improper protection, plain and simple.
Consider that leg injuries are common in combat sports – one analysis found about 27% of injuries in MMA are fractures, a higher rate than in boxing or kickboxing. The proper shin guards absorb and disperse impact, helping prevent those nasty bruises or worse. They also give you the confidence to throw kicks full force. As ONX founder (and 3X MMA Coach of the Year) Trevor Wittman says, gear that truly protects you lets you “train harder, longer”. In short, properly sized shin pads keep you in the fight.
Tip: Reference the sizing image below before ordering to ensure accurate shin and foot measurements.
How to Measure for MMA Shin Guards
Great shin guards are designed for a precise fit, so measuring yourself accurately is crucial.
Follow these steps to find your size:
- Measure Your Shin Length: Use a flexible tape measure to measure the distance from the bottom of your kneecap to the top of your ankle bone. This is your shin length. (It helps to have a friend assist, so you can stand naturally.) Write down this measurement in inches or centimeters.
- Consult the Size Chart: Sizes (e.g., Small, Medium, Large) are typically based on shin length, with height or foot length as secondary factors. For example, ONX Leg Armor shin guards are custom-fitted by both measurements. An ONX size Medium corresponds to roughly a 13" shin length, while Large is about 14". Always check the brand’s chart; one company’s “Large” could be another’s “Medium.”
- When in Doubt, Size Up: If your measurement falls between sizes or at the upper end of a range, it’s wise to choose the larger size for more coverage. You can tighten the straps to adjust the fit, but a shin guard that’s too short won’t
