A sofa's length and depth are not the only dimensions that affect comfort. House Beautiful's expert guidance also considers seat height, noting that leg and torso proportions vary and that one measurement will not suit every person equally.

Check Sofa Seat Height Alongside Its Footprint

The suggested sitting check places feet flat on the floor, with the knees bent slightly beyond a right angle while the back is supported. In a compact room, try to balance that fit with the available footprint. A sofa should be comfortable for its regular users as well as small enough to place.