Bamboo socks

I have a pair of socks in my handbag to knit while waiting for a doctor or and appointment. I had to had wait at a blood test for 2 hours last week and finished the handbag socks for Wayne  I made him a pair of bamboo socks a few years ago and he loves them very much so last retreat I brought some more yarn to make him another pair but the ball was a bit on the short side and the are only ankle length