I’m not a big fan of bamboo needles since the tips tend to get splitty and catch your yarn after a while. I MUCH prefer these silky smooth birch needles from Knitters Pride. 24″ is my go-to length for knitting one or two socks at a time on two circulars. (Yes, that means you need two needles.)I only carry the sock sizes in fixed length circular needles. If you need bigger needles, check out the selection of interchangeable needles instead.