These Are Some Small Needles
Last Fall I bought one pair of these 11" circulars to try. At the time, I bought size 10s. Don't know why, because I rarely use size 10s. So they have just sat around until now.
I wouldn't want to knit very much with them, but in a pinch they are okay.
The needle itself is very short. I am not so sure that they are any faster than using double points, but at least the purchase was not wasted.