Korean Shoe Sizes Explained

Korean shoe sizes follow the Mondopoint standard, which means the number printed on the label is simply your foot length in millimetres. A KR 250 shoe is built for a 250mm — that is, 25.0cm — foot, while KR 265 fits a 26.5cm foot. There is no abstract numbering to decode and no separate men's and women's scales to reconcile: the system is unisex, so the same KR number describes the same foot regardless of who is wearing the shoe. Sizes step up in 5mm increments — 235, 240, 245, 250 and so on — which is why Korean labels can capture half-sizes without ever resorting to a decimal point.

This is a genuinely different philosophy from the US and UK scales, which evolved from historical units (the English inch and the barleycorn) and bear no direct relationship to a measurable length. Where a US or UK size is an arbitrary point on a brand-managed ladder, a Korean size is a physical measurement you can take yourself with a ruler. The practical upshot is that if you know your foot length in millimetres, you already know your Korean size — round to the nearest 5mm and that is the number to look for.

Because a Korean size is just foot length in millimetres, the first step in any conversion is to divide it by ten to get centimetres, then read across to the system you need. KR 250 lines up with roughly a women's US 8.5, and KR 265 with about a men's US 9. These are approximations rather than fixed equivalences — lasts vary between brands, and US women's sizes run about one and a half sizes above the men's number for the same foot, a split that Korean sizing simply does not have. The table above gives the worked values for each row so you do not have to do the arithmetic yourself.

European sizes follow the Paris-point convention, where each full size adds roughly two-thirds of a centimetre of length, so the EU column climbs faster than the US or UK columns as your foot grows. The single reliable anchor across every one of these systems is foot length, which is exactly what the Korean number already gives you. If a chart ever disagrees with the converter, trust the centimetre measurement rather than any one country's label, and treat the rest as a best-fit starting point for trying the shoe on.

When you buy from Korean athletic and lifestyle labels — or through the large Korean marketplaces that ship internationally — product pages almost always list sizes in millimetres rather than US or EU numbers. That is good news, because it removes the guesswork: instead of trusting a conversion chart, you can match the listed mm figure directly to your own foot. Stand on a sheet of paper, mark heel to longest toe, measure that distance in millimetres and add a few millimetres of wiggle room, and you have the number to order.

Keep the 5mm rounding in mind when your measurement falls between two sizes. A 247mm foot sits between KR 245 and KR 250; if the shoe has a snug last or you wear thicker socks, rounding up to 250 is usually the safer call. Measure both feet and use the larger one, since most people are slightly asymmetric, and re-check your length every year or so — feet change over time. With a reliable millimetre measurement in hand, ordering Korean sizes online is often more predictable than navigating the abstract US and UK ladders.