These socks are made from 100% Anti-allergic yarn, suitable for winter, spring and summer. Baby alpaca fibre is also hollow, lightweight, durable and hypoallergenic. Baby alpaca wool is also exceptionally warm, as the hollow alpaca fibres act as an insulator to keep warm air in. its hypoallergenic qualities make it an excellent choice for those who suffer from allergies. Length from toe to heel (without stretching) S* US 5-7.5 , UK 3--5, EUR 35-37 ------ 7.09 "(18 cm) M* US 7-9, UK 5-7, EUR 38-40 ------- 7.87 "(20 cm) L* US 9-11.5, UK 8- 9, EUR 40-42 ------ 9.06 "(23 cm) Length from heel to upper end - 14 cm International shipping is 8 $ Combined postage available +2 $ for each additional Items will be shipped within 1-2 business day after payment received Delivery to Europe varies between 5 and 15 working days Delivery to other countries varies between 20 and 40 days