Size-Fit Summary: Size XS = US Size 5-7. Size S = US Size 8-10. Size M = US Size 11-13. Size L = US Size 1-3. Size XL = US Size 4-6. Keep tiny toes warm in Hunter Boots with these snug boot socks. Designed to fit comfortably inside the Original Kids Rain Boot Boot and enhance fit while adding comfort and warmth, these black boot socks feature a cozy cable knit fold down cuff and Hunter Original logo.