Generic 18sizes 16 inch"(40cm)Circular Colorful Bamboo Knitting Needles US 0-15 Bamboo Includes 18 pcs of bamboo circular knitting needles.Needle length: 3.4"(8.5cm)*2;Tube length: 9.2"(23cm) ;Total:16"(40cm). Needles are anti-resistance to be durable and very comfortable to be used even for long periods of time. Flexible tubing accommodates a variety of knitting styles. The diameter range from 2mm to 10mm.Size is permanently marked on needles. Detailed size please refer to description.Due to different methods of measurement,size and length may differ slightly.