Self Storage Unit Size Guide
Find the Perfect Storage Unit Size
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This is our comprehensive guide to storage unit sizes ranging from 5x5 (walk-in closet) to 10x30 (mini-warehouse). Use our volume-based capacity charts below to find the right fit for 1 to 5+ bedrooms.
| Unit Size | Sq. Footage | Cubic Volume | Capacity | What Fits (Common Items) |
|---|---|---|---|---|
| 5' x 5' | 25 sq. ft. | 200 cu. ft. | Walk-in Closet | Twin mattress, 10-15 boxes, seasonal gear, or office equipment. |
| 5' x 10' | 50 sq. ft. | 400 cu. ft. | Mid-sized Bedroom | Queen mattress, sofa, dresser, TV, motorcycle, or studio contents. |
| 10' x 10' | 100 sq. ft. | 800 cu. ft. | Family Room | Contents of a 2-bed apartment: King bed, appliances, and sofa. |
| 10' x 15' | 150 sq. ft. | 1,200 cu. ft. | Master Bedroom | 3-bed apartment: Piano, dining set, bedroom sets, and patio gear. |
| 10' x 20' | 200 sq. ft. | 1,600 cu. ft. | One-Car Garage | 3-4 bedroom home, a standard vehicle, or commercial inventory. |
| 10' x 30' | 300 sq. ft. | 2,400 cu. ft. | 1.5-Car Garage | 5+ bedroom home, business warehousing, or large boat/vehicle. |
5' x 5' (25 SQ. FT.)
The "Walk-in Closet" Size
Capacity: Roughly 200 cubic feet of stackable space.
Ideal For: Seasonal decluttering, office archives, or gear for a hobby.
What Fits: It is ideal for a twin mattress set, a few pieces of small furniture (like a desk or chest of drawers), and approximately 5 to 10 medium moving boxes. It's also perfect for seasonal gear like bicycles, skis, or holiday decorations.
Pro Tip: Use the 8-foot ceiling height to stack your off-season clothing bins at the back.
5' x 10' (50 SQ. FT.)
The "Mid-Sized Closet"
Capacity: Roughly 400 cubic feet.
Ideal For: Studio apartments, one-bedroom moves, or motorcycle storage.
What Fits: A queen-sized mattress set (stood vertically), a dresser, a sofa, and 10-15 medium boxes OR a single motorcycle and your riding gear.
Pro Tip: Pack your heaviest furniture at the back and stack boxes to the ceiling to leave a narrow walkway for access.
5' x 15' (75 SQ. FT.)
The "Extended Walk-in"
Capacity: Roughly 600 cubic feet.
Ideal For: Narrow furniture, long items, or 1-bedroom apartments with extra gear.
What Fits: A queen-sized bed, a sofa, a dining table, and up to 20 boxes. The 15-foot depth makes it perfect for kayaks, paddleboards, or long rugs.
Pro Tip: This unit is deep - place your least-used items at the very back and stack vertically to keep the entrance clear for frequent access.
10' x 10' (100 SQ. FT.)
The "Standard Bedroom"
Capacity: Roughly 800 cubic feet.
Ideal For: 2-bedroom apartments or roughly 3 rooms of furniture.
What Fits: The contents of two full bedrooms, including king-sized mattresses, large appliances (fridge/washer), and roughly 20+ medium boxes.
Pro Tip: To maximize your 100 square feet, use the "Box Wall" method - stack boxes of similar size along one wall to the ceiling to keep your furniture accessible in the center.
10' x 15' (150 SQ. FT.)
The "Master Bedroom" Size
Capacity: Roughly 1,200 cubic feet of volume.
Ideal For: 2-3 bedroom apartments, home remodeling projects, or small business inventory.
What Fits: A king-sized bed, three medium-sized dressers, a dining room set, a sofa, and roughly 25-30+ medium boxes.
Pro Tip: Because this unit is 15 feet deep, store items you need less frequently (like seasonal appliances or holiday decor) at the very back and create a center aisle to access your furniture.
10' x 20' (200 SQ. FT.)
The "One-Car Garage" Size
Capacity: Roughly 1,600 cubic feet.
Ideal For: 3-4 bedroom homes, full-sized vehicles, or commercial inventory.
What Fits: The contents of a multi-bedroom house - including king-sized bed sets, large sectionals, dining sets, and all major appliances. It also fits most standard cars, SUVs, or pickup trucks.
Pro Tip: If you are storing a vehicle, leave enough space on the driver's side to open the door, and use the perimeter for boxed items or spare tires.
10' x 25' (250 SQ. FT.)
The "Large Garage" Size
Capacity: Roughly 2,000 cubic feet.
Ideal For: 4-5 bedroom homes, large vehicles, or professional equipment.
What Fits: The entire contents of a large home, including oversized sectionals, multiple king-sized bedroom sets, large appliances, and roughly 50+ boxes. It also fits long-bed pickup trucks or small boats.
Pro Tip: With 25 feet of depth, you can create a "walkway" down the middle to access items at the back without having to unload the entire unit.
10' x 30' (300 SQ. FT.)
The "Mini-Warehouse" Size
Capacity: Roughly 2,400 cubic feet.
Ideal For: 5+ bedroom homes, commercial inventory, or a vehicle plus household storage.
What Fits: The complete contents of a large 5-bedroom house, including all furniture, major appliances, outdoor gear, and roughly 60+ boxes. It also comfortably fits a full-sized vehicle with significant room left over for storage.
Pro Tip: Because this unit is 30 feet deep, organization is key. Use the back 10 feet for items you won't need for a while, and keep a clear aisle down the center to maintain access to your gear.