Roughly half the size of a standard one-car garage, 10×10 storage units offer 100 square feet and 800 cubic feet of storage space. With enough space for multiple sets of bedroom furniture with room to spare, 10×10 storage units are commonly used to store the contents of a one or two-bedroom apartment. Generally, this size is the most common storage unit size at any indoor facility. You can store up to three rooms of items or 2 full bedrooms. For instance, this size would fit an entire family room or a modest one- or two-bedroom apartment. A 10×10 storage unit has ample space for boxes, documents, records and inventory rolling carts.