The circular knitting needles come with 11 different sizes, including 3.0mm, 3.5mm, 4.0mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 7.0mm, 8.0 mm, 9.0 mm and 10.0 mm, the length of each needle is about 31.5 inch/ 8 cm
The circular knitting needles are bamboo with semi-pointy tips. The cord is a stainless steel tubing. The tube structure makes these the best for knitting in the round with two circular needles. The tube is only slightly thinner than the needles so you don't get super-tight stitches near the end of the needles, and the tubes are wonderfully floppy and don't get in the way of your hands. Very natural feeling once you get used to the steel tubing. Works great for so many knit sizes.