Kask 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.

Kask Bike Helmet Size Charts

Kask Road and Urban Bike Helmets

Model S M L XL
Lifestyle
51 – 58 59 – 62

20 5/64″ – 22 53/64″   23 15/64″ – 24 13/32″
Mojito X 48 – 56 52 – 58 59 – 62 63 – 64
18 7/64″ – 22 3/64″ 20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″ 24 51/64″ – 25 13/64″
Mojito X peak 48 – 56 52 – 58 59 – 62 63 – 64
18 7/64″ – 22 3/64″ 20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″ 24 51/64″ – 25 13/64″
Rapido
52 – 58 59 – 62

20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″
Valegro 50 – 56 52 – 58 59 – 62
19 11/16″ – 22 3/64″ 20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″

Kask Triathlon Bike Helmets

Model S M L
Bambino pro
55 – 58 59 – 62

21 21/32″ – 22 53/64″ 23 15/64″ – 24 13/32″
Bambino pro evo
55 – 58

21 21/32″ – 22 53/64″
Infinity
52 – 58 59 – 62

20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″
Mistral
55 – 58 59 – 62

21 21/32″ – 22 53/64″ 23 15/64″ – 24 13/32″
Protone 50 – 56 52 – 58 59 – 62
19 11/16″ – 22 3/64″ 20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″
Utopia 50 – 56 52 – 58 59 – 62
19 11/16″ – 22 3/64″ 20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″

Kask Mountain Bike Helmets

Model S M L XL
Caipi 50 – 56 52 – 58 59 – 62
19 11/16″ – 22 3/64″ 20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″
Defender 55 – 56 57 – 58 59 – 60 61 – 62
19 11/16″ – 22 3/64″ 22 7/16″ – 22 53/64″ 23 15/64″ – 23 5/8″ 24 1/64″ – 24 13/32″
Rex
52 – 58 59 – 62

20 15/32″ – 22 53/64″ 23 15/64″ – 24 13/32″