What causes dimensions to vary?

The upholstering trade is a handicraft and also manual work with human hands. Very soft materials are also used for the upholstery. That is why dimensional tolerances are unavoidable and all specified dimensions are approximate dimensions.

Do differences in seating comfort exist?

How comfortable you feel when sitting on a sofa depends primarily on the upholstery and its proportions. But there is no universal definition of seating. Upholstery is done loosely or tightly depending on the particular model. The softer the upholstery the more you sink into the sofa. In contrast, it is easier to stand up or sit down with firm upholstery. You don't sink in as much. And its look is clear-cut and distinct. It's a question of your own personal taste. That's why we recommend an extensive period of "test sitting."