Measure your head circumference with a soft tape measure wrapped around the widest part of your head, just above your eyebrows and ears. Most adult helmets come in S (52-55cm), M (55-58cm), L (58-61cm), and XL (61-64cm). If you're between sizes, size up and use the fit adjustment dial to fine-tune. Always try the helmet on — different brands fit different head shapes, and a model that fits your friend may not fit you.
Ski Helmet · Half-Shell Ski Helmet
How do I know what size half-shell ski helmet to buy?
Related gear types
If this answer nudged you toward a different style, these guides compare specs and trade-offs.
All-Mountain Ski Helmet
$60 – $280
Versatile helmets designed for general skiing across varied terrain and conditions.
Adjustable ventilationRemovable ear padsGoggle integration strap or clip
Freestyle/Park Helmet
$50 – $200
Low-profile helmets designed for terrain park skiing, pipe riding, and freestyle progression.
Low-profile skate-inspired shapeAudio-compatible ear padsDurable ABS or hybrid shell
Full-Shell Ski Helmet
$80 – $450
Helmets with complete hardshell coverage extending over the ears for maximum protection.
Hardshell extends over earsSuperior penetration resistanceMaximum impact absorption
More questions
- Is MIPS worth the extra cost in a half-shell helmet?
- Can I use my half-shell ski helmet for biking or other sports?
- How do I prevent my goggles from fogging with a half-shell helmet?
- When should I replace my half-shell ski helmet?