0-21 L A-C1 M A-C1 S A-C1 XS A-C1 4-61 61 86 105 123 143 163 OSFA1 UK 34 UK 3.51 UK 47 UK 4.55 UK 55 UK 5.55 UK 64 UK 6.53 UK 71 UK 7.51 UK 81 UK 2.52 UK 21 32B2 32C1 34B1 34C1 36B1 36C1 38A1 30B1 10 child1 10.5 child1 11 child1 11.5 child1 12 child1 12.5 child1 13 child1 UK 11 One Size1 XS2 S2 M2 L1 XL2 2XL1