Our Mox Boxes are filled with three pairs of shoes to grow with your baby during their first year of life. Our inspiration behind the Mox Box was to take the guess work out of sizing. When baby grows out of the first shoe, you'll have the next size ready and waiting! These make a darling baby shower gift and include 3 different styles and sizes. To ensure ordering a proper size, please measure your child’s foot prior to ordering. We recommend adding 1/2″ to your child’s foot measurement for growing room SIZING for FIRST YEAR (styles as shown): Size 1: 0-4 months, soft sole, 3.7" Size 2: 3-10 months, soft sole, 4.1" Size 3: 7-15 months, soft sole, 4.5" SIZING for SECOND YEAR (styles as shown): Size 3: 7-15 months, soft sole, 4.5" Size 4: 1-1.5 years, hard rubber sole, 4.9" Size 5: 1.5-2.5 years, hard rubber sole, 5.3" MATERIALS: Made from our soft vegan leather. Not to mention, waterproof too! Hand wash or wipe clean if dirty.