If the area is below 60 square meters, the living room is usually small or even has no separate living room. This kind of apartment sofa should be mainly small split sofas, which can be freely moved and combined, and the backrest of this split sofa should not be too high, and the number should not exceed three, otherwise the small room will appear crowded or even messy.
Small and medium-sized apartment with an area of 60~ 100 square meters, the living room area is usually not less than 12 square meters, which is more suitable for medium-sized double or triple sofas. It is suggested to buy a split sofa, which can be "1+3", "2+3" or "1+2+3" according to the area.
If the area is 100 square meter, and some living rooms will be as big as more than 30 square meters, then it must choose a whole sofa with a larger size and a longer sofa surface. Don't put more than one sofa in this living room, because putting more sofas will be like selling sofas.