What's the length of a general bed?
The Chinese bed is about 2 meters, and the European is 2.2 meters
Single with 1.5 meters *2 meters, the best marriage, do not intend to sleep with a child, 1.8 meters *2 meters suitable, if you want to take the child to sleep 2.2 meters *2 meters appropriate.
The standard double bed is 1.5*2.0m, the king size bed is 1.8*2.0m, and the single bed is 1.2*1.9m