π Shoe Size Converter
Convert between US, UK, EU, and CM (Mondopoint) sizes.
Equivalent Sizes
How to Use This Converter
Pick the group (men, women, or kids), choose the sizing system your size is in, enter the size, and the converter shows the equivalent in every other system.
Select Men, Women, or Kids. Kids use a separate scale, so do not convert them through the adult table.
Choose the system your size comes in: US, UK, EU, or CM (Mondopoint foot length).
Enter the size. The table below shows every equivalent size instantly.
When between sizes, size up for running shoes and size down for snug fashion fits.
How Shoe Size Systems Relate
Every system is anchored to foot length, but each slices it differently. US sizes step in thirds of an inch (barleycorns). UK sizes use the same step but start counting from a different zero, which is why a men's US 9 is a UK 8.5. EU sizes step in two-thirds of a centimeter (Paris points) and are unisex. Mondopoint skips the abstraction entirely: 270 means a 270 mm foot. Because the tables are what factories actually use, this converter looks up real chart rows rather than computing from formulas, which keeps half-size quirks accurate.
Worked Example
Men's US 9 converts to UK 8.5, EU 42.5, and 27.0 cm Mondopoint. A women's US 8 is the same foot length: it equals a men's US 6.5, UK 6, EU 39. A kids' US 3 (youth) equals UK 2, EU 34, and 22.5 cm. Notice the kids' row does not line up with the adult pattern, which is exactly why the separate kids table exists.
Measuring at Home, the Right Way
Trace your foot in the evening while standing, measure heel to longest toe, and use the larger foot's number. Add 0.5 to 1 cm for toe room: running shoes need the full centimeter, dress shoes can take less. If you are between Mondopoint values, round up. And treat every conversion as a starting point: two brands can label the same foot "US 9" and "US 9.5" depending on their last, so check brand-specific charts before ordering, especially from EU or JP brands.
Frequently Asked Questions
How do I measure my foot size at home?
Stand on a piece of paper with your full weight on the foot, trace around it holding the pen upright, and measure the longest distance from heel to toe in centimeters. Do it in the evening, when feet are slightly swollen, and measure both feet: use the larger one. Add 0.5 to 1 cm of wiggle room for comfort.
Why do shoe sizes vary between brands?
Sizes are based on each brand's "last" (the foot-shaped mold), and brands target slightly different fits: running shoes run long, fashion brands run narrow. The conversion chart gives the standard equivalent, but reviews mentioning "runs small" or "runs large" are worth half a size of adjustment.
What is Mondopoint?
Mondopoint is the international standard (ISO 9407) that sizes shoes by actual foot length in millimeters or centimeters. A Mondopoint of 270 means a 27.0 cm foot. It is the most reliable system because it measures your foot, not an arbitrary scale, and it is why this converter keys everything off centimeters.
Do kids sizes convert the same way?
Kids use their own scale (youth/K and C sizes) with different increments, so do not convert kids sizes through the adult table. Use the kids table here, and remember children's feet grow fast: check the fit every few months and leave about a thumb's width of room.
What is the difference between US men's and women's sizes?
US women's sizes run 1.5 larger than men's for the same foot: a women's 8 is the same length as a men's 6.5. UK sizes differ by 2 between genders, and EU sizes are unisex. Widths also differ: women's standard width is B, men's is D.