Sleeper sofas come in a range of sizes, from loveseats or chairs-and-a-half that convert into twin-sized beds and full-sized ... as a sofa, then convert into a roughly king-size mattress.

Finding a sofa is a trifecta of requirements. You want a model that converts from cosy Netflix sessions to the Land of Nod. You want something that fits into a corner of your living room or spare ...