There are several types of couches. The list includes sofa beds, small, medium and large couches. Large sofas are known as sectional couches. Their minimum length is nine feet and can reach lengths of fourteen feet or more. These curved couches are very large so they are best in spacious living rooms.
Average or medium sized sofas are six to eight feet in length with room for up to three persons. Most of them are thirty inches deep and thirty inches high. The small ones are five to six feet long. Small couches are called loveseats. They have a capacity for two people. These are most suitable for compact living rooms and apartments.
To determine the right size, you have to consider several factors. The first is to make sure your desired couch can actually fit in the opening. You also have to consider the space available. Loveseats can be used as substitutes for large sofas in an apartment.