These Straight Knitting needles are made of metal, they are light-weight made from stainless steel, durable and lightweight, smooth polished surface to ensure rapid knitting. The sizes range from 2.0mm 2.5mm 3.0mm 3.5mm 4.0mm 4.5mm 5.0mm 5.5mm 6.0mm 7.0mm 8.0mm. Each needle is 36cm/14inch in length. Each pair is sold seperately.