I always had 60 min sessions. In his private practice, there were times when we'd end on time, but if I were upset, I'd stay in the office while he went to the other room to do notes, etc. Then he'd come back to check on me; sometimes I'd just leave then, sometimes we'd talk for a few more minutes. I have a good internal clock, so I'd always feel when time was ending, and he'd wind down gently. Often we'd just sit silently for the last couple of minutes. I often found that very calming.