Boys Cotton Rich Stripe And Check Design Socks (Pack Of 3) 100% Polyester Cotton rich rib top socks. Available in two designs. US Child 7-9.5 EUR 23-26, US Child 10-13 EUR 27-30, US Child 13.5-4.5 EUR 31-36, UK Child 5-6.5 EUR 37-38. 78% Cotton 20% Polyester 2% Elastane. Machine washable.