At EU 25 a fitted shoe should still leave 12 to 17 mm in front of the toes, the range Austrian researchers set because a foot this age outgrows a 12 mm margin in about a month.
UK to US conversion
UK and US kids' sizes sit one number apart, UK 10 to US 11, until the US scale resets two steps before the UK one. Between a 210 and 215 mm foot the pair breaks: US has already restarted at 1 while UK still reads 13, a 12-number gap that closes once UK resets too. Add one to the UK number everywhere except that short window, where the two scales briefly disagree by a full cycle.
At this size, UK to US
One size up from UK 7.5, US moves 0.5 to US 9 while UK rises 0.5 to UK 8, holding their spacing. Both UK 7.5 and US 8.5 sit on a half step at this size. For UK 7.5, the US column here runs US 8, US 8.5, US 9, stepping a half size at a time.
Size Chart UK EU US CM 7 24 8 15 7.5 25 8.5 15.5 8 26 9 16 8.5 27 9.5 16.5 9 28 10 17
Frequently Asked Questions Does UK 7.5 round up or down in US? Round up rather than down: a growing foot closes a larger gap fast, while a short shoe forces the toes to curl. The plus12 gauge adds the first 12 mm for you.
ℹ️
Note Kids sizes transition to adult sizes around EU 38 / US 5 Children's feet grow rapidly - remeasure every 3-4 months Allow 10-15mm growing room when fitting Shoe sizes can vary by brand and style See a number that looks off? Report an error on this page.