Consider Your Family's Height. It should be noted that the greater the depth, the more comfortable the sofa. When you need a couch big enough for a certain number of people, this is a great brief article and set of diagrams to … Visual Appeal. Depth can also vary greatly, ranging from around 75 cm (30 inches) to upwards of 1 m (40 inches). As for height, height can vary higher or lower from around 77.5 cm … Sectional sofa deep seat 110 or 90 cm Jude. Couch depth is among the primary reasons why a one size couch doesn't fit all. How to Choose the Right Sofa Depth. The seat is set at a height of 17.5” (44.5 cm) and a depth of 22” (55.9 cm). The actual depth of the seating area is reduced by the depth of the sofa's arms and back of the sofa. People above 6'2" may find it uncomfortable to sit on … The Floyd 3-Seater Sofa has a width/length of 87” (221 cm), depth of 31” (78.7 cm), and height of 32” (81.3 cm). The Floyd 3-Seater Sofa is a contemporary upholstered sofa … Linear sectional sofa with chaise longue, corner elements, meridienne, armchair and ottoman. Here's a set of 4 charts that illustrate the proper sofa dimensions for 2, 3, 4 and 5 people.