A motorcycle gear size guide helps riders find the correct helmet, jacket, gloves, and boots size using body measurements. Getting the right fit is critical for both safety and comfort — armor must align with your joints, and helmets must be snug without causing pressure points. Use this tool to convert your measurements to the right size across all major gear types.
Helmet
Measure 1 in (2.5 cm) above eyebrows, around widest part
Brand Notes:
Jacket
Measure around fullest part of chest, arms relaxed
Fit Tip:
Gloves
Measure around knuckles of dominant hand, excluding thumb
Fit Tip:
Boots
Measure from heel to longest toe on longest foot
Fit Tip:
Quick Reference Size Charts
Helmet Sizing (Head Circumference)
| Size | cm | inches |
|---|---|---|
| XS | 53–54 | 20.9–21.3 |
| S | 55–56 | 21.7–22.0 |
| M | 57–58 | 22.4–22.8 |
| L | 59–60 | 23.2–23.6 |
| XL | 61–62 | 24.0–24.4 |
| XXL | 63–64 | 24.8–25.2 |
Gloves Sizing (Knuckle Circumference)
| Size | inches | cm |
|---|---|---|
| XS | 6.5–7.0 | 16.5–17.8 |
| S | 7.0–7.5 | 17.8–19.0 |
| M | 7.5–8.0 | 19.0–20.3 |
| L | 8.0–8.5 | 20.3–21.6 |
| XL | 8.5–9.0 | 21.6–22.9 |
| XXL | 9.0+ | 22.9+ |
How to Use the Motorcycle Gear Size Guide
Finding the right size for your motorcycle gear is more than a comfort issue — it is a safety issue. Poorly fitting gear means armor that misses its target, helmets that are too loose in a crash, and gloves that snag on controls. Use this motorcycle gear size guide to get the right fit before you buy.
Step 1: Choose Your Units
Toggle between imperial (inches) and metric (cm) using the switch at the top. Imperial is used in the US, while most European brands publish size charts in centimeters. The tool automatically converts your measurements to give you the right size in either system.
Step 2: Measure Your Head for Helmets
Use a flexible tape measure about 1 inch (2.5 cm) above your eyebrows, running around the widest part of your skull. Take 2–3 measurements and use the largest. Helmet sizes run XS (53–54 cm), S (55–56 cm), M (57–58 cm), L (59–60 cm), XL (61–62 cm), and XXL (63–64 cm). Brand note: Shoei helmets typically run one size small — if you measure 58 cm, try an L. HJC helmets run large — your measured size often fits well.
Step 3: Measure Chest and Waist for Jackets
Measure your chest at the fullest point with arms relaxed at your sides. For waist, measure around your natural waist, not the belt line. Jacket sizes typically correspond to chest measurements: S (36–38 in), M (38–40 in), L (40–42 in), XL (42–44 in), XXL (44–46 in). When between sizes, go up for comfort — you want room to layer and for the armor to sit correctly on your joints.
Step 4: Measure Your Hands for Gloves
Wrap the tape around your dominant hand across the knuckles, excluding the thumb. This single measurement determines your glove size. Gloves should fit snugly but not restrict blood flow. If your fingers are very long relative to your hand width, consider gloves marketed as "long finger" variants.
Step 5: Measure Your Foot for Boots
Stand on a piece of paper and mark your heel and longest toe. Measure that distance in inches or centimeters. Motorcycle boots have a break-in period, so choosing true-to-size or slightly larger than street shoes is fine. EU sizing is common for European brands: EU 41 = US 8, EU 42 = US 9, EU 43 = US 10, EU 44 = US 11.
FAQ
Is this motorcycle gear sizing tool free?
Yes, completely free with no signup required. All calculations run in your browser — your measurements are never sent to any server.
Why do different helmet brands have different sizes?
Helmets vary significantly between brands because of different head shape assumptions and internal foam constructions. Shoei helmets typically run small (size up), while HJC helmets run large (consider sizing down). Always try a helmet on before buying if possible — a snug but not painful fit is correct.
How do I measure my head circumference for a helmet?
Use a flexible tape measure about 1 inch (2.5 cm) above your eyebrows, going around the widest part of your head just above the ears. Measure in centimeters for the most accurate helmet size selection.
How do I measure for motorcycle gloves?
Wrap a tape measure around the knuckles of your dominant hand, excluding the thumb. This is your glove circumference. Most glove sizing is based on this single measurement in inches or centimeters.
What should motorcycle boots fit like?
Motorcycle boots should fit similarly to regular shoes but with a little extra room for thick socks. Your foot length in centimeters maps directly to EU sizing. Break-in time is normal — new boots often feel stiff but soften with wear.
What if I am between sizes for a motorcycle jacket?
When between sizes in a motorcycle jacket, sizing up is generally recommended for comfort and to accommodate armor. However, if the jacket has CE-rated armor, fit matters for the armor to align with your elbows, shoulders, and back — a properly fitting jacket with armor is safer than a loose one.