Divan beds are available in a size suitable for any bedroom, large or small. From a micro single to a super king, you can find a divan bed that is perfect for you. But that is only the beginning. Their true value is found in their customizability and their many storage options. You can go with a basic option of just the bed base and mattress and dress it up with your favorite cushions. Or you can dress it up more by adding a headboard or even a cornerboard to give your bed more of a sofa feel.
Also be sure to measure the bed frame, if you already have one. This will also need to fit within the headboard. The general rule when measuring the height of the headboard is this: measure half way up the wall of the room where the headboard will be placed against. Your headboard should never exceed this height! Try to find a headboard that either reaches half way or down to a few inches below that point. This will prevent the headboard from "crowding" and overpowering the room.