TeamObsidian Bike Helmet Size Chart

1. Achieve the perfect fit by measuring your head circumference correctly.

2. Watch the video below to see how to measure your head correctly. (If you don’t see a video below, please refresh this page, or you might need to allow this website through your Ad blocker.)

3. VIDEO: How To Measure For A Bike Helmet

4. On the chart below, find the helmet model that you are interested in, then find your head measurement to see which size you need.

TeamObsidian Bike Helmet Size Charts

TeamObsidian Adult Bicycle Helmet

Model S/M M/L L/XL
Airflow 53 – 57 cm 57 – 61 cm 61 – 65 cm
20.8″ – 22.4″ 22.4″ – 24 24 – 25.6″

TeamObsidian Kids FunWave Bicycle Helmets

Model Toddlers Children
Aged 5-7		 Children
Aged 5-8
Pink Octopus 48 – 52 cm 50 – 54 cm
18¾” – 20½” 19¾” – 21¼”
Blue Shark 48 – 52 cm 50 – 54 cm
18¾” – 20½” 19¾” – 21¼”
Unicorn 48 – 52 cm 50 – 56 cm
18¾” – 20½” 19¾” – 22″
Dragon 48 – 52 cm 50 – 56 cm
18¾” – 20½” 19¾” – 22″