You can use these guidelines to estimate how big a storage unit you'll need. If you've looked this over, your're still not sure, bring us a list of your belongings and we'll recommend a space that's just the right size. All sizes from 5' x 10' to 30' x 30' Large door units available for Cube Vans and higher item storage - Large tradesman units available Climate Controlled units; up to 10' x 20'