Running shoe size chart: your size in every brand

Reading the result

• Size to try: the brand's size for the same length in its own chart.
• If in doubt: two sizes are possible. Either your length falls between two sizes of the chart (the nearest one is suggested), or you run trails with descents or long distances: half a size up, up to a full size.
• Measured foot: for brands that publish no foot length, the size is estimated from the cm sizes Nike, Hoka and Salomon give to the same foot.
• The calculation goes through the foot length when both brands publish it, else through the cm size (JP or CM column). The two are never mixed: a JP 27 size is not a 27 cm foot.
• The model comes before the brand: some models run small or large. Follow the size advice on the shop's page for the model you buy.

Measure your foot

① Foot length, from the wall to the tip of the longest toe. ② Room kept in the shoe, about a thumb's width. ③ Heel against the wall.

1. Paper on a hard floor, one edge against a wall. Stand, heel against the wall, weight on both feet.
2. Mark the tip of your longest toe (not always the big toe) and measure in centimetres.
3. Measure both feet and keep the longer one, preferably late in the day.

Enter the measurement as it is in the tool: it takes the smallest size whose published foot length reaches yours, as Nike advises (between two sizes, size up). In the shoe, about 1 to 1.5 cm should remain in front of your longest toe: a thumb's width for Brooks, 1 to 1.5 cm for Mizuno, about 1 cm for On.

US and UK sizes: what changes between brands

• Same US size, different UK size. A men's US 9 is a UK 8 at Nike, ASICS, Saucony and Puma, and a UK 8.5 at adidas, Hoka, Salomon and New Balance.
• Men's to women's US sizes. Add one and a half sizes at Nike, ASICS, Saucony, Brooks and Puma, a single size at adidas and Hoka. Unisex models follow men's sizes (Brooks).
• Read your gender's chart. At Brooks, a women's UK 8.5 and a men's UK 8 are the same size.
• Don't start from your everyday shoes: On advises a running shoe at least half a size above a street shoe, Mizuno half a size to a full size above dress shoes.

Depending on how you run

• Road, racing: the nearest size. No brand gives a rule of its own for racing shoes: fit depends on the model.
• Trail with descents: downhill the foot slides forward. Salomon notes that runners on terrain with a lot of elevation gain and descent take shoes half a size to a full size larger: that is what the "Trail with descents, long distances" option does. Keep a midfoot held well by the lacing.
• Long distances, heat: On notes that feet tend to swell as distance and heat increase. Don't cut your margin.

Width matters too

A shoe gives in width, never in length (Brooks). If it pinches at the sides, look for a wide version rather than a longer size:

• widths are written in letters: at Brooks, D is the standard men's width, 2E wide, 4E extra wide; B is the standard women's width, D wide;
• ASICS, Brooks, Mizuno, New Balance, Hoka, Altra and Topo Athletic make wide versions of some of their models;
• Altra and Topo Athletic design a roomier forefoot than average across their range.

For the rest of the choice (use, cushioning, drop), see the guide how to choose running shoes.

Sources of the advice

• Room in front of the toes, half a size: Brooks, Mizuno, On.
• Measuring, between two sizes, Nike widths: Nike.
• Widths, "gives in width, not in length": Brooks, ASICS, Altra, Topo Athletic, New Balance, Hoka.
• Trail, descents, swelling feet: Salomon, On, choosing trail running shoes.
• Paris point and Mondopoint: ISO 9407:2019 standard.
• Each brand's size chart is listed under the tool.