Sole sizes are US. Label shows UK. M = Men's W = Women's Fun Summer Water Shoes: This kids' sandal is available in a variety of colors and features fixed charms on the front straps. These girl's sandals are ideal for school, playdays and summer days spent at the beach or pool All-Day Play: Finally, sandals with a more secure "stay-on" fit to keep up with your busy kids. The secure fit makes these a ideal choice for toddler or kids shoes What Size Should I Buy?: These shoes offer a relaxed fit, so Crocs recommend ordering a size up to the next largest whole size Personalization: Add Jibbitz shoe charms to your Crocs to show your unique style and creativity! From well-known characters to food and more - express yourself