Adidas Shoe Size Guide

For length, Adidas is one of the more dependable brands on the high street. The men's, women's and kids' ranges all sit close to true to size, so the size you already wear in most everyday trainers is usually the size to order here. If you normally take a women's US 8, the chart below puts you at a UK 6 and an EU 38 — and that is the size most people find fits Adidas straight out of the box, with no need to hedge up or down.

The one model worth a second thought is Ultraboost. Its knitted Primeknit upper flexes and relaxes around the foot as you wear it, and several Boost-cushioned running shoes share that slightly long, roomy feel. Plenty of runners size down half a size in Ultraboost to firm up the midfoot hold without crowding the toes. Everything else — lifestyle classics and most performance shoes alike — can be bought at your normal size with confidence. As always, lasts vary by model, so treat any single conversion as a close starting point rather than a guarantee.

Adidas splits broadly into lifestyle and performance, and the two camps behave a little differently on the foot. On the Originals side, the Stan Smith, Samba and Gazelle are the reference points: flat, classically cut silhouettes that come up true to size, so your usual number is the right call. These are the models people buy most often without trying on, precisely because the fit is so predictable.

Performance is where you want to pay closer attention. The Adizero racing and training range tends to sit snug and close, in keeping with its speed-focused brief, while Ultraboost and several other Boost runners lean slightly long. Read that as a tendency rather than a fixed offset — the safest approach is to start from your true size, then nudge half a size in the relevant direction only if a specific model is known to run long or short. Foot length in centimetres, shown in the charts below, is the most reliable anchor when you are choosing between two adjacent sizes.

Adidas is a German company, so European sizing is front and centre on its boxes and product pages. EU sizes are built on Paris points, the continental standard, and they run as a single unisex scale — an EU 42 is an EU 42 whether the shoe is cut for men or women. The split only appears in US sizing, where the women's scale sits roughly one and a half sizes above the men's for the same foot length. That is why a women's US 8 and a men's number a size and a half lower can land on the same EU figure.

Reading the chart is straightforward: find your size in the system you know, then follow the row across. A women's US 8 maps to UK 6, EU 38 and a foot length of about 24.1 cm; a women's US 9 maps to UK 7, EU 39 and roughly 25.0 cm. On the men's side, a US 9 maps to UK 8.5 and EU 41–42, around 25.7 cm. Where an EU value spans two numbers, that simply reflects how Paris points fall between half sizes — round to whichever of the two your foot length sits closest to. When in doubt, measure your foot and match the centimetre figure, since that column is the canonical reference behind every other system.