They are made to look somewhat comfortable, but I assure you there really isn't much padding and stuff. And we don't carry anything oversized in our showroom, and even if we did it's only an extra 2, 4, or 6 inches generally.
Here's a fun fact, the dead don't give a fuck about shit, everything we do is to make the living feel better, whether a real comfort, or in this case illusionary.