XS: 15-18cm (for ages 4-6) Soft fabric for a comfortable fit and excellent elasticity!! The large frills are super cute, and you can tell you're wearing adorable socks even from afar♪ The length is ankle-high, with a rounded wave shape around the edge. The large lace frills make girls look incredibly cute. Formal shoes are also available! For recitals, birthdays, weddings, 100-day celebrations, and the first meal ceremony. Also for entrance ceremonies, school entrance, graduation, and school events. XS: 15-18cm (for ages 4-6) S: 18-20cm (for ages 6-8) M: 20-22cm (for ages 8-10) L: 22-24cm (for ages 10-12) (Because these socks are stretchy, if you're unsure about the size, we recommend choosing a smaller size)