Nike Shoe Size Guide

The most useful thing to know about Nike is that fit is not quite uniform across the men's, women's and kids' ranges. Women's trainers tend to run slightly small, so most people are safest sizing up half a size from their everyday US number — particularly in narrower lifestyle silhouettes where the toe box sits a little closer than you might expect. Men's and kids' styles, by contrast, generally come up true to size, so the number you wear in other major US brands should carry across without much fuss.

If your feet are on the broader side, it is worth checking whether the model you want comes in a wide fitting, as Nike offers wide-foot options across several of its core silhouettes. Because the underlying last varies from one model to the next, treat the half-size-up rule for women's as a sensible starting point rather than a guarantee, and lean on foot length in centimetres — the anchor behind every figure in the charts below — whenever you are caught between two sizes.

Nike spans lifestyle classics, dedicated running shoes and basketball silhouettes, and the reassuring news is that sizing stays fairly consistent from one line to the next. The same labelled size will land in broadly the same place across the range, so once you have settled on your Nike number you rarely need to relearn it when you switch from an everyday trainer to a running pair or a court shoe.

The differences that do crop up are about feel rather than dramatic shifts in length. Streamlined lifestyle models can sit a touch snugger through the midfoot, while roomier everyday and running designs tend to feel a little more generous, and some high-top basketball styles wrap the ankle more closely. None of this usually warrants jumping a full size; if a particular model is described as snug or roomy, the half-size adjustment already noted for women's — and the option of a wide fitting — is normally enough to dial in the fit.

Reading the charts below is straightforward: find your Nike US size in the first column and read across to UK, EU, JP and foot length in centimetres. For a worked example, a women's US 8 lines up with a UK 6, an EU 38, a JP 24.5 and a foot length of roughly 24.1 cm; a men's US 9 lines up with a UK 8.5, an EU 41–42, a JP 26.5 and about 25.7 cm. EU sizing is unisex and based on Paris points, which is why a single EU number can sit against different US figures for women and men.

That unisex EU scale is also the cleanest way to compare a women's and a men's size, because US numbers split by gender: a US women's size is roughly one and a half larger than the equivalent US men's size for the same foot. If you are shopping outside the US, match on foot length in centimetres first — it is the canonical reference for every row — then read off the UK or EU figure. Remember that these conversions are approximate and that the last varies by model, so apply the women's half-size-up adjustment before you commit to a pair.