ONX Precision Line Sizing & Fit Guide

Finding the right fit matters. ONX gear is engineered to fit securely, protect consistently, and break in naturally through training. Below you’ll find sizing recommendations and fit guidance for gloves, shin guards, knee pads, and headgear so you can train with confidence from day one.

MMA Sparring Gloves - What size should I choose?

• 135 lbs or less: Small / Medium
• 135–185 lbs: Large / XL
• 185 lbs and up: XXL

The gloves are designed to feel snug initially and break in naturally as the padding and materials settle.

Are the gloves supposed to feel tight in the fingers?

Yes. A secure finger fit helps maintain control and alignment. With consistent training, the gloves will soften slightly while maintaining structure.

Do I need to heat mold the gloves?

No. ONX MMA sparring gloves are engineered to break in naturally and do not require heat molding.

Shin Guards & Knee Pads

Read our in depth article about how to size shin guards HERE

How do I choose the right size?
Select your size based on height and weight, not shoe size. If you’re between sizes, sizing up provides better coverage and protection.

How does the shin guard + knee pad combo sizing work?
Choose your shin guard size first. Knee pads are scaled to match for proper alignment and coverage.

Precision Line Sparring Gloves Sizing Recommendations

135 lbs or less - Small/Medium
136 lbs - 185 lbs - Large/XL
186 lbs or more - XXL

Headgear

Is there a size chart for headgear?
Yes. Measure your head circumference and reference the chart below to ensure a secure, low-profile fit.