Suomy Helmets Size Chart

Suomy Apex Steely Helmet
Adult Helmets
Helmet Size Centimeters Head Circumference Hat Size
X-Small 53 - 54 cm 20 3/4" 6 1/2" - 6 5/8"
Small 55 - 56 cm 21 1/4" 6 3/4" - 6 7/8"
Medium 57 - 58 cm 22 3/8" 7" - 7 1/8"
Large 59 - 60 cm 23 1/8" 7 1/4" - 7 3/8"
X-Large 61 - 62 cm 23 5/8" 7 1/2" - 7 5/8"
2X-Large 63 - 64 cm 24" 7 3/4" - 7 7/8"
3X-Large 65 - 66 cm 24 3/8" 8" - 8 1/8"

Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.