Size: 16 US: 3 UK: 2.5 EU: 18 Recommended age: 0-1 Months Foot Length: 10.5cm/4.13 Suitable For: Infant Size: 17 US: 3.5 UK: 3 EU: 19 Recommended age: 1-3 Months Foot Length: 11cm/4.33 Suitable For: Infant Size: 18 US: 4 UK: 3.5 EU: 19.5 Recommended age: 3-4 Months Foot Length: 11.5cm/4.53 Suitable For: Infant Size: 19 US: 4.5 UK: 4 EU: 20 Recommended age: 4-6 Months Foot Length: 12cm/4.72 Suitable For: Infant Size: 20 US: 5 UK: 4.5 EU: 21 Recommended age: 6-9 Months Foot Length: 12.5cm/4.92 Suitable For: Infant Size: 21 US: 5.5 UK: 5 EU: 22 Recommended age: 9-12 Months Foot Length: 13cm/5.12 Suitable For: Infant Size: 22 US: 6 UK: 5.5 EU: 23 Recommended age: 12-18 Months Foot Length: 13.5cm/5.31 Suitable For: Infant Size: 23 US: 6.5 UK: 6 EU: 23.5 Recommended age: 18-24 Months Foot Length: 14cm/5.51 Suitable For: Infant Size: 24 US: 7 UK: 6.5 EU: 24 Recommended age: 2-2.5 Years Foot Length: 14.5cm/5.71 Suitable For: Toddler Size: 25 US: 7.5 UK: 7 EU: 25 Recommended age: 2.5-3 Years Foot Length: 15cm/5.91 Suitable For: Toddler Summer Fashion Girls Shorts. The clothes are made of polyester + spandex the fabric is soft comfortable and breathable.Perfect Gift for Daily life.