A 5x10 storage unit is about the size of a large walk-in closet. Furniture from a studio or one-bedroom apartment will fit in a 5x10 storage unit. This includes a queen-size mattress set, love seat, dresser, TV, bike and several storage boxes. A 5x10 storage unit can easily fit about 30 or more regular size boxes.
A 10x10 storage unit is about the size of an average bedroom. Furniture items from two bedrooms and an entire family room can fit in a 10x10 storage unit. This may include mattress sets, dressers, nightstands, sofa, chairs, coffee table, book shelves and more. If you were storing nothing but medium-sized boxes that are 20 inches by 20 inches, you could expect a 10x10 storage unit to hold up to 100 boxes. By the time you add furniture pieces and bedroom sets, the number of boxes a unit could hold is more like 50-60.
A 10x15 storage unit is equivalent in size to a small one-car garage. The contents of a two- to three-bedroom house will fit in a 10x15 storage unit. This may also include large items like big-screen TVs, couches, entertainment centers, office furniture, dining tables and chairs and large appliances, like a refrigerator and washer/dryer set. A minimum of 60 standard-size boxes should fit within a 10x15 storage unit.
A 10x20 storage unit is the size of a standard one-car garage. Items from a three- or four-bedroom house or apartment will fit in a 10x20 storage unit. This may include couches, mattress sets (queen-size and king-size sets), a dining room set, workout equipment, a refrigerator and washer and dryer. As the size of the storage unit increases, so does the amount of large furniture items you can store. Keeping that in mind, a 10x20 storage unit should easily be able to store between 80-100 boxes.
A 10x30 storage unit is the size of a standard two-car garage. A 10x30 storage unit will hold items from a fully furnished five-bedroom house including mattress sets, dressers, couches, a dining room set, entertainment center, major appliances, seasonal items, outdoor equipment and bikes. The 10x30 storage unit is typically one of the largest sizes available, and as such, can hold over 100 boxes. If you’re storing nothing but boxes, it could hold way more but usually people have a combination of boxes and furniture items that need safekeeping.