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 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5
Euro 39.3 40 40.7 41.3 42 42.7 43.3 44 44.7 45.3 46 46.7 47.3

Kid's Footwear 

Size
UK 13 13.5 1 1.5 2 2.5 3 3.5 4 4.5 5
USA 13.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Euro 31.5 32 33 33.5 34 35 35.5 36 36.7 37.3 38