A kit including the pattern and yarn to make these socks is available here: https://coopknits.bigcartel.com/product/coop-knits-x-vick...

Sizes
1 (2, 3)
To fit foot circumference: 20.5 (23, 25.5) cm 8 (9, 10) in
Actual foot circumference of sock (unstretched): 18 (20, 22) cm 7 (7¾, 8¾) in
Length of leg to top of heel: 15cm 5¾in Foot length is fully adjustable within the pattern.