There are a few things to consider when choosing a platform bed. The first is the size of the bed. Make sure to measure your room and leave enough space for walking around the bed. The next thing to consider is the height of the bed. A platform bed can be anywhere from 14 inches to 36 inches off the ground, so make sure you choose one that will fit in with your decor and be comfortable for you to get in and out of. If you have a mattress that needs a box spring, make sure to get a platform bed that has some type of support system for the mattress. Lastly, take into consideration what kind of materials you want your platform bed to be made out of. There are options in wood, metal, upholstered, and more so pick something that fits both your style and needs.