Interchangeable circular knitting needles set, 12 sizes, 4 Length-6inch(40cm), 20inch(60cm), 32inch(80cm), 40inch(100cm).48 combinations. Needle part 4.9inch length. Suitable for various knitting projects. Corcular needles are neatly stored in the bag, preventing loss and convenient to carry. Knitting needles are made of natural bamboo, lightweight and non-slip.