Circular knitting needles can be purchased with the tips and the cords separated so that knitters can mix and match to achieve various sizes and lengths. This is a very efficient way of developing your knitting needle collection! 
These Seeknit CURVE Cords have a new and improved more flexible nylon cord that rotates and swivels to prevent twisting while knitting.  These new CURVE cords fit with standard Seeknit tips and the new CURVE tips too! Just twist to fit - no grip tightener needed!

Choose your cord length! Circular Knitting needles are measured tip to tip, so add on the length of your needle tips to the length of the cord to get the full measurement of your circumference. The Knit Cafe carries cord lengths:
19-20cm / 8" 
30cm / 12"
40cm / 16"
55cm / 22"
75cm / 29.5"

Seeknit Cords also come sized to fit different needle tips.
M1.8 fit needle sizes 2mm-3.25mm/ US 0-3
M2 fit needle sizes 3.5mm - 10mm / US 9-15

Get CURVE needle tips to Match your cords HERE