I am a size 3-9 and it is just the right size for our son who wears 4Y shoes. I'm not sure where 3-9 comes from. Impossible for a size 9 to wear them, they are perfect for his 4Y foot suggesting they are a bit tight for a size 5 and too small from a size 6 onwards.
Pack of 6 Seamless-Toe Quarter 𧦠Athletic Socks for Big Boys by Jefferies Socks
62 Review
π Premium Prince Athletic Socks - Active Black Boys' Clothing for Top-performance
45 Review
π Aminson Active Ankle Athletic Apparel for Girls and Boys
48 Review
Jefferies Socks Boys Seamless Toe Crew Athletic Socks 6-pack
47 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review