Size Chart Because trilogies are always a good way to go, the Women's Trio 1 offers three ultra soft, everyday socks in one package. With premium Merino wool and a women's specific fit, these socks are a great option for all day comfort. Features: - Women's Dasher Crew: 66% Merino Wool, 33% Nylon, 1% Elastane - Women's Ethno Graphic Crew: 55% Merino Wool, 43% Nylon, 2% Elastane - Women's Jitterbug Crew: 60% Merino Wool, 39% Nylon, 1% Elastane - Last Chance: Discontinued Style - Only available to ship within the USA