Crafted from a rugged blend of cotton and polyester that's designed for long lasting performance these laces are perfect for classic boots, work shoes or hikers. 62% cotton 38% polyester for long lasting wear Estimated Lace Sizes 4-5 eyelets use 30 -36 inch lace 5-6 eyelets use 40-45 inch laces 6-7 eyelets use 54 inch laces 7-8 eyelets use 63 inch laces 9 eyelets use 72 inch laces 10 + eyelets use 81 inch laces