
According to standard furniture guidelines, a typical 3-seater sofa has a width that ranges from 78 to 96 inches, which is equivalent to 198 to 244 centimeters. These measurements generally refer to the total width from the outside of one arm to the outside of the other.
It is important to recognize that these dimensions are a general guide. The final size of a sofa can vary based on the specific manufacturer and the style of the piece. Design elements such as the thickness of the arms, the back height, and the overall shape can all influence the exact measurements of any given 3-seater sofa.


