We have a king-size and, as omacookie says, it can get small sometimes with DH and the dog! The only double bed I/we have issues with is the one at my father's house. The mattress is about 30-35 years old and toast. There is a sag in the middle that dips to about the center of the earth. You have to grip the edge of the mattress to keep from being swallowed by it or smothered by the other person in bed with you. I simply CAN NOT sleep in that bed and make excuses as to why we can't stay with him when we visit. We were just on vacation and sleeping in a queen which was more than tolerable. Doubles work but I'm very restless and just feel more comfortable with more room sometimes.