Size guides On

How to choose the right size?

Don’t bother measuring your insole you’ll never get it exactly right. Instead, check the measurements in cm or CHN on any of your sneakers. Use that info to find the corresponding US size in the size guide. For example, a 25 cm insole length corresponds to a US 7 in Vans. Keep in mind, sizes may vary slightly between brands due to different measuring methods.

Size guides for all brands.

Looking for a different brand?

Find it here.

Unsure about the size? We’d be happy to help!

+44 8447044722

[email protected]

Not the right fit? You have 30 days to return your shoes.

If you choose the wrong size

We’d be happy to exchange it for you.

Which size guide are you looking for?

On Running tops - women

SizeChest (cm)Waist (cm)Hips (cm)
XS82.5-85.564.5-67.591.5-94.5
S87.5-90.569.5-72.596.5-99.5
M92.5-95.574.5-77.5101.5-104.5
L97-10179-83106-110
XL102-10685-89111-115
XXL110-111896-105116-122

On Running footwear - women

EURUSUKCM*
365322
36.55.53.522.5
376423
37.56.54.523.5
387524
38.57.55.524.5
398625
408.56.525.5
40.59726
419.57.526.5
4210827
42.510.58.527.5
4311928

On socks - unisex

EURUSSize
35-374-6XS
38-407-8.5S
40-439M
43-459.5-11L
46-4911.5-14XL

On socks - unisex

EURUKSize
35-38.53-5.5XS
39-42.56-8.5S
43-469-10.5M
47-4911-13L

On Running bottoms - men

SizeWaist (cm)Hips (cm)
XS7589
S76-8290-95
M83-8996-101
L90-96102-107
XL97-105108-113
XXL106-114114-119

On Running footwear - men

EURUSUKCM*
4076.525
40.57.5725.5
4187.526
428.5826.5
42.598.527
439.5927.5
44109.528
44.510.51028.5
451110.529
4611.51129.5
471211.530
47.512.51230.5
481312.531
49141331.5

On Running tops - men

SizeChest (cm)Waist (cm)Hips (cm)
XS907589
S91.5–94.578.5-81.590.5-93.5
M96.5-99.583.5-86.595.5-98.5
L101.5-104.588.5-91.5100.5-103.5
XL106.5-109.593.5-96.5105.5-108.5
XXL111.5-114.598.5-101.5110.5-113.5

On

On, the Swiss performance running shoe and sportswear brand, has made significant strides in sportswear since its founding in 2010. Co-founded by former Swiss Ironman champion Olivier Bernhard and his partners, On stands out with its innovative CloudTec® cushioning technology. This patented system is designed to provide runners with superior impact comfort and a stable rebound that is encased in their signature "clouds". The company's product range is diverse and includes specialist running shoes such as Cloudnova, Cloud X and Cloudmonster, as well as sportswear and accessories for a variety of outdoor activities.