Guide to Standard Sofa Dimensions
· A standard sofa has the average dimensions of 7084 inches in length x 3040 inches in width x 3042 inches in height.. Standard sofas are often designed to seat 3 people so if you want to comfortably fit a coffee table in front of the sofa, make sure you allow 10 to 20 inches in between for plenty of legroom.. The sofa height is made up between the sofa seat height .