This casual sock is designed with soft, skin-friendly cotton, making them a wardrobe essential! With comfort and durability in mind, these socks couple perfectly with your favorite pair of Birkenstocks! FEATURES Learn more about the features Elasticated Pressure-Free Cuff94% Cotton 4% Polyamide 2% Spandex (Lycra) PRODUCT DETAILS Details for the Birkenstock Cotton Slub Men's - Beige White Sock Type: Mid-Calf Sock  Fit: Stand with your heel flush against a wall and place a measuring tape underneath your foot. Read the measured foot length in millimeters from the back of your heel to the front of your longest toe.If you are between two sizes, choose the next highest size for a comfortable fit. Size 45-47 Men's:  45EU 12-12.5US 10,5UK 290mm 46EU 13-13.5US 11,5UK 300mm 47EU 14-14.5US 12UK 305mm