This seems like an obvious point, but it bears repeating. Before you can find a storage unit of the right size, you need to know what you’re putting in it and how much space it will take up. We have storage units ranging from 10 sq ft (which can comfortably hold 20 standard-sized storage boxes) to 250 sq ft (enough to fit the contents of two 7.5 ton trucks). That could be a large office move, the entire contents of a large 4-5 bedroom house, or the stock for a retail business.