Rubber soleHeel measures approximately 4.33 inches"SOCK-LIKE UPPER - 100% Soft Lining with Breathable Baby Friendly Mesh Fabric Upper, Lightweight and Flexible to Support Natural Foot Movement,Provide a Natural Feeling.FITNESS DESIGN - Anti-slip Rubber Sole is Good for Toddlers Learning Walking.Consolidation,Remove Moisture, Keep the Feet Dry and Comfortable.EASY WEAR - Adjustable Hook and Loop Closure Toddle Summer Walking Shoes,Easy to Put on and Take Off .OCCASION - Fashion Style Sandal Stays Sporty with Durable, Comfortable Mesh Material that's Ideal for Walking,Beach and Leisure.Let Your Little Explorer Feel Cozy and Safe when Exploring The Great Outdoors.SIZE TIP - The Age is for Your Reference,Please Measure Baby's Feet to Match the Shoes Length.If Your Baby has a Tiny Feet,Thanks