The size of the sofa

The international definition of sofa size is width * depth * height, not length * width * height, in mm.
1. Width
Width refers to the maximum distance between the outer periphery of the two armrests from left to right of the sofa, which is commonly referred to as the "length" of the sofa, and the seat width refers to the width of the armrests on both sides.
The formula can be expressed as: seat width = width - armrest width * 2
The single, two, and triple people of the sofa are determined according to the width and seat width, because these two data determine the seat length of the sofa.

2. Depth
Depth refers to the maximum distance between the front and back of the sofa from front to back, including the backrest, which is commonly referred to as "width", and seat depth refers to the depth in addition to the backrest.
The formula can be expressed as: seat depth = depth - thickness of the back rest
Due to the requirements of the style, the sofa depth is 800-1000 and the seat depth is 550-700 are normal, but some friends like deeper sofas, because sitting on it will feel very relaxed. But the depth should not be too great.
(1) Style may be taken into account;
(2) The depth is too large, and it will be difficult for the human body to lean against the back of the sofa;
(3) If the edge of the sofa falls exactly in the middle of the calf, it will affect the comfort level.

3. Height
Height refers to the maximum distance between the sofa from the ground to the highest part of the sofa, which is the same concept as the usual meaning of "height", and seat height refers to the distance from the ground to the seat surface.
The seat height of European and American large sofas will be between 430-470 height, Asian figures, height between 40-45 is basically OK, as for the total height to combine the style of the entire sofa, it is best not to change at will.
General size Because of its varied style and style, it is difficult to have an absolute size standard, only some regular general sizes.
The armrests of the sofa are generally 560-600mm high
Single type: length: 800-950mm, depth: 850-900mm; Seat height: 350-420mm; Back height: 700-900mm
Double type: length: 1260-1500mm; Depth: 800-900mm Three-person: Length: 1750-1960mm; Depth: 800-900mm
Four-person type: length: 2320-2520mm; Depth 800-900mm
It should be noted here: generally imported sofas or European-style sofas, classical sofas, and American sofas are more atmospheric and occupy a large space, and if they are placed in the living room of a small unit, they often make the living room look more narrow.