Slub Line Q Thick yet very soft, these socks are crafted from a cotton-acrylic blended yarn for the perfect balance of durability and comfort. The textured fabric, enriched with slub yarn, adds depth, while the striped cuff and subtle knit variations create distinctive accents that set them apart from traditional tennis socks. Construction : Rib Knitting Composition : 93% Cotton 6% Nylon 1% Spandex. COO : Made in Japan Size guide : Size Medium : Length 5.0" and fit best for 25-28cm feet, approximately US Men's size 7-10 Size Large : Length 6.0" and fit best for 27-30cm feet, approximately US Men's size 9-12