Storage Unit Sizes Explained: 5x5 to 10x30 Compared

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5x5 and 5x10: closet-to-hallway equivalents

A 5x5 unit (25 sq ft) suits seasonal decor, a few boxes, and small furniture, comparable to a small closet. A 5x10 (50 sq ft) holds the contents of a small studio or a single extra room, such as a bed, dresser, and a dozen boxes.

10x10 and 10x15: apartment-sized units

A 10x10 unit (100 sq ft) is the most commonly rented size nationally and typically holds a 1-2 bedroom apartment's furniture and boxes. A 10x15 (150 sq ft) steps up to a small house or a 3-bedroom apartment's worth of belongings.

10x20 and 10x30: house and garage equivalents

A 10x20 unit (200 sq ft) is roughly one car-length longer than a standard garage bay and fits a 3-4 bedroom house. A 10x30 (300 sq ft) is the largest standard size, comparable to a two-car garage, and typically holds a 4-5 bedroom home or a vehicle plus furniture.

Cost ranges by size

National average monthly rates trend roughly: 5x5 $39-$69, 5x10 $59-$99, 10x10 $99-$159, 10x15 $139-$209, 10x20 $179-$269, and 10x30 $239-$359. Climate-controlled units typically add 25-50% to these ranges.