Shoe Size Conversion Chart

How the converter works

Enter a US size and the converter looks up the matching row in that scale’s table: men’s US 9 → UK 8, EU 42.5, CM 27. Sizes between rows snap to the nearest row — and anything outside the table tells you to measure your foot instead of guessing.

Output · formula · meaning

The three rules of shoe sizes

• Rule 1 — men’s: US = UK + 1. A men’s US 9 is a UK 8, always, on every brand that uses both scales.
• Rule 2 — women’s: US = UK + 2. A women’s US 9 is a UK 7. (Shortcut between the US scales: women’s US ≈ men’s US + 1.5 — so a women’s 8 is a men’s 6.5.)
• Rule 3 — EU and CM drift by brand: EU sizing is the least standardized of the four, and different makers round differently — US 9 men’s is EU 42.5 on most charts but 42 on some. When two charts disagree, foot length in centimeters is the master key: measure your foot and match the CM column.

Men’s chart

Women’s chart

Kids’ chart

Little-kid sizes run 10K–13.5K, then the scale restarts at 1Y (youth) and runs to 7Y. EU and CM values below are the common published mappings — kids’ shoes vary the most by brand, so measure.

Measure your foot in two minutes

1. Do it in the evening. Feet swell through the day — evening is your largest, truest size.
2. Trace on paper against a wall. Stand with your heel against the wall on a sheet of paper, weight fully on the foot, and mark the tip of your longest toe.
3. Measure heel to toe in centimeters. That number is your foot length. Your CM box size runs about 1 cm longer than it — that gap is toe room.
4. Measure both feet and use the larger. Almost nobody’s feet match; fit the bigger one.

Who uses this

• Online shoppers: buying from a UK or European store — convert once instead of guessing at checkout.
• International travelers: shoe shopping abroad where the boxes speak EU or CM.
• Parents: kids’ feet grow fast — the K/Y split and the measure-it rule.
• Gift buyers: converting someone else’s US size to the scale the gift’s brand uses.

Accuracy & limitations

These are the widely published standard mappings (consistent with the major brand charts), but shoe sizing is not an exact science: brands vary by up to half a size, EU sizes are the least standardized, and width (narrow/regular/wide) isn’t in any conversion table. CM box sizes run roughly 1 cm longer than your measured foot — that’s deliberate toe room. If you’re between sizes in the converter, size up. The charts print cleanly from your browser for the shoe-store trip.