The Bridgedale Endurance Trekker Ladies Sock is designed for any season hiking use, whether you're trekking or back packing this sock is ideal with its tough Woolfusion construction for durable performance. Built especially tough for the hardened outdoor enthusiast the unique Bridgedale construction ensures dry, warm comfortable feet mile after mile. For womens socks - Medium fits UK size 5-6.5, Large fits UK size 7-8.5