By Adalheid Voigt. Modern. At Wednesday, January 16th 2019, 20:33:13 PM.
The depth of the sofa is one of the most important measurements to take. The way to do this is to measure from the outside edge of the seat all the way to the back. It is best to do it from one of the sides. The next step is to measure the diagonal depth of the sofa. You do this by placing a straight tape measure from the top back of the frame to the bottom front.
If you plan to use it as the primary sleeping surface for yourself, look into the type of mattress that comes with it. As you are no doubt aware, sleepers come with many different types of mattresses, some using specialty materials, some come with inner-springs and others are air beds. Try and find one with a mattress type you are happy using. Also look for a mechanism that opens and closes easily.
When you sit down on a sofa to try it out, take into account the height and feel of the back as well. Do you prefer a tight-back sofa or one with loose cushions? Try out all different cushion configurations to see which one feels right. Do remember to take your shoes off before you place your feet on a sofa in a furniture store if that is your sitting style.