The smallest storage space available at most storage facilities is usually a 5x5 foot or occasionally a 5x4 foot space. This is NOT to say that this is the correct size for you and your belongings. More often than not, folks that want the smallest unit available are usually storing a household worth of furniture and you would be hard pressed to even fit a couple of sofas in a five foot by five foot space. If you are storing anything more than a few stray pieces of furniture and boxes it is almost a guarantee that you will need a 5x15 foot space or larger. Even a 5x15 foot space typcally only stores the contents of a one bedroom apartment without any appliances.