pediped Originals Cooper Crib Shoe (Infant) 100% Leather Leather sole Size Reference: SMALL (US size: 4 - 4.5 / 6-12 months / EU Size 19) MEDIUM (US size: 5 - 5.5 / 12-18 months / EU Size 20) Large (US size: 5.5 - 6 / 18-24 months / EU Size 21)