Great gift to baby Gender:Girls&Boys Shoe upper material: PU Closure Type:Hook&Loop Sole material:Rubber Style:Casual Fashion Package content:1 pair baby shoes Note!!!please understand: The built-in battery is a button battery generally continuous using time is 10-20 hours which can be replaced when it runs out. The battery will be exhausted if the storage time is too long.But it does not affect the normal using. Toddler Athletic Shoes Baby Shoes for Walking Cute Shoes Toddler Girl Toddler Boy Shoes 4t Girls Shoes Light Shoes for Kids Boys Shoes 7 Youth Toddler Boy Running Shoes Garnet Shoes Shoes for Boys Size 9 Toddler Fashion Shoes for Kids Size 6 Toddler Shoes Girls Kid Light up Shoes 9 Toddler Boys Shoes Withe Shoes for Boys Boys Athletic Shoes Size 3 Tennis Shoes for Girls Shoes for Girls Baby Loafer Shoes Youth Size 1 Size chart: Size:21 Insole length:13cm/5.12 Recommended age:6-12 Months US :7 UK:6.5 EU:21 Suitable for:Toddler Size:22 Insole length:13.5cm/5.31 Recommended age:12-18 Months US :7.5 UK:7 EU:22 Suitable for:Toddler Size:23 Insole length:14cm/5.51 Recommended age:18-24 Months US :8 UK:7.5 EU:23 Suitable for:Toddler Size:24 Insole length:14.5cm/5.71 Recommended age:2-2.5 Years US :8.5 UK:8 EU:24 Suitable for:Toddler Size:25 Insole length:15cm/5.91 Recommended age:2.5-3 Years US :9 UK:8.5 EU:25 Suitable for:Toddler Size:26 Insole length:15.5cm/6.10 Recommended age:3-3.5 Years US :9.5 UK:9 EU:26 Suitable for:Toddler Size:27 Insole length:16.5cm/6.50 Recommended age:4-4.5 Years US :10.5 UK:10 EU:27.5 Suitable for:Little Child Size:28 Insole length:17cm/6.69 Recommended age:4.5-5 Years US :11 UK:10.5 EU:28 Suitable for:Little Child Size:29 Insole length:17.5cm/6.89 Recommended age:5-5.5 Years US :11.5 UK:11 EU:28.5 Suitable for:Little Child Size:30 Insole length:18cm/7.09 Recommended age:5.5-6 Years US :12 UK:11.5 EU:29.5 Suitable for:Little Child