Gr&ouml;do (Groedo) Organic Cotton Adult-Unisex Socks (3-pack) Made in Germany. Machine washable 85 F degrees (30 C degrees). 98% organic cotton, 2% elasthane. Certified by GOTS (Global Organic Textile Standard). Made in Germany. Size EU 35-36 fits US women 5-6, US men 3 1/2 -4 1/2 . Size EU 37-38 fits US women 6 1/2-8, US men 5-6. Size EU 39-40 fits US women 8 1/2-9, US men 7-7 1/2. Size EU 41-42 fits US women 9 1/2-10, US men 8-8 1/2. Size EU 43-44 fits US women 10 1/2-12, US men 9-10 1/2. Size EU 45-46 fits US women 13-14, US men 11-12.