This is a 5 lb spool of 5mm cotton string. Previously labeled at 6mm, but after measuring multiple times I feel that 5mm is more accurate. It is approximately 1350 ft of 100% cotton.There is a photo that compares the 3.5mm, 5mm, and 8mm string. This is perfect for your macrame creations and also to add to your weaves. Actually, any piece of fiber art! Made in N. America.