"Treat your feet! Because they deserve to be loved too. The organic cotton socks are seamless and breathable, keeping your feet happy, even after a long days work or a long days sitting and doing nothing. We wont judge. EU- 36 - 40 UK- 3½ - 6½ US- 6 - 9 80% Organic Cotton 18% Polyamid 2% Elastane PETA Approved Vegan Environmentally Friendly Dyed Yarn - Oeko-Tex® Pre-washed Anti-pilling Made in Portugal"