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 footwear - men

USEURUKCM*
7406.525
7.540.5725.5
8417.526
8.542826.5
942.58.527
9.543927.5
10449.528
10.544.51028.5
114510.529
11.5461129.5
124711.530
12.547.51230.5
134812.531
14491331.5

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 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 - women

USEURUKCM*
536322
5.536.53.522.5
637423
6.537.54.523.5
738524
7.538.55.524.5
839625
8.5406.525.5
940.5726
9.5417.526.5
1042827
10.542.58.527.5
1143928

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 socks - unisex

USEURSize
4-635-37XS
7-8.538-40S
940-43M
9.5-1143-45L
11.5-1446-49XL

On socks - unisex

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

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 features 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.