All sizes listed on our site are USA sizes

Men's Footwear 

Size
UK 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
USA 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13
EURO 40 40.5 41 42 42.5 43 44 44.5 45 45.5 46 47 47.5

Kids' Footwear 

Size
UK 12 12.5 13 13.5 1 1.5 2 2.5 3 3.5 4 4.5 5
USA 12.5C 13C 13.5C 1Y 1.5Y 2Y 2.5Y 3Y 3.5Y 4Y 4.5Y 5Y 5.5Y
EURO 30 31 31.5 32 33 33.5 34 35 35.5 36 36.5 37.5 38