Shoe Size Converter

On Nike's charts a UK 9 is a US men's 10 on the men's chart, or a US women's 11.5 on the women's chart. The US uses two separate numbering systems for men and women, while UK numbers are close to unisex, so check whether a US size is listed as men's or women's before converting.

Add 1.5 to the men's US size to get the women's US size, and subtract 1.5 to go back. On Nike's charts a men's 9 and a women's 10.5 both fit a 26.2 cm foot. This converter does it through foot length, so it also gives the UK, EU and centimeter equivalents for both at once.

Yes, on standard US charts the women's number is 1.5 higher for the same foot, and the gap stays constant. Both US scales grow by the same step, about a third of an inch per full size, so the offset never drifts. Brands can still run half a size off, so a shoe's own chart wins.

Both brands publish size charts close to the industry standard, but actual fit varies by shoe model and category, sometimes by a full size within one brand's own lineup. Nike has a reputation for running narrow in some models, and Adidas sizing has been reported inconsistent across styles, so the printed number is a starting point, not a guarantee.

Mondopoint is the international standard (ISO 9407) that sizes shoes by foot length and width in millimeters, usually in 5 mm steps, instead of an arbitrary scale. It is the system printed on most ski boots. This converter shows foot length in centimeters, which is not Mondopoint itself but translates cleanly across every sizing system.

It follows Nike's published men's, women's and unisex charts exactly, converted through foot length in centimeters, so every number on screen traces back to one consistent source. Other brands can differ by half a size, since shoe sizing isn't standardized between manufacturers, so when a shoe has its own chart, that chart wins.

No, not in this version. Kids' sizing restarts at a small toddler scale and then restarts again into a youth scale around age 7, which makes it a genuinely different system rather than a simple extension of adult sizing. This converter covers men's and women's adult sizes only, so for children's shoes use the brand's own kids' chart.

Around a US men's 7.5 or a US women's 9, since Nike's charts put both of those sizes at a 24.9 cm foot. Foot length alone doesn't account for width, so it's a close starting point rather than a guarantee. Measuring both feet in the evening, when they are slightly larger, gives the most reliable number.

The EU system (Paris points) measures roughly two-thirds of a centimeter per size, while the US system is based on a different historical unit, about a third of an inch per size. The scales just start counting from different points, which is why a US men's 9 and an EU 42.5 describe the same foot despite looking unrelated.

It's a reliable starting point for choosing a size to order, since it's based on standard published charts, but treat it as a guide rather than a guarantee, because fit still varies by brand and model. When a retailer publishes its own size chart for a specific shoe, that chart is more accurate than a general converter like this one.