A 4×5 storage unit: what it is, and what fits.
There is no standard 4×5 storage unit. A 4×5 is 20 square feet (about 160 cubic feet at an 8 ft ceiling), which sits between locker size and the smallest distinct unit operators rent, the 5×5 (25 sqft, ~200 cubic feet). Search for a 4×5 and you are booked into a 5×5 in almost every market — five extra square feet at the 5×5 price. A genuine 4×5 exists only as a locker, at the minority of facilities that rent them.
Because you end up in a 5×5, price the 5×5. We do not publish a rate for it: no free public source supports one, and an estimate dressed as a measurement is worse than an honest gap. Ring two or three sites near you, ask each for the month-two rate, and compare those.
How a 4×5 compares to what you can actually rent.
Cubic feet = floor sqft × 8 ft ceiling. Standard sizes are distinct walk-in units; a 4×5 rounds to the 5×5 unless a facility rents lockers.
Why operators skip from a locker to a 5×5.
Self-storage is built on a small number of standard footprints — 5×5, 5×10, 10×10, 10×15, 10×20 — so a facility can lay out a building efficiently and quote a rate instantly. A 4×5 falls in the gap between a locker (roughly 10 square feet) and the 5×5, and the extra five square feet a 5×5 gives costs the operator almost nothing to build. So rather than stock a 4×5, operators rent you the 5×5. Where a location does carry lockers, a 4×5 or 5×5 locker is the genuinely smaller option, but those are the exception rather than the rule.
The practical upshot: do not spend time hunting for a 4×5. Price and book a 5×5. It is the smallest thing most facilities rent, it costs the same as a 4×5 would, and you get a little more room. See what actually fits in the 25 square feet before you book.
Is there a 4x5 storage unit?
Not as a standard walk-in unit. The major operators do not rent a 4x5; their smallest distinct unit is the 5x5 at 25 square feet. A 4x5 is 20 square feet, which falls between locker size and the 5x5, so a search for a 4x5 unit is served by a 5x5 in almost every market. Some facilities that rent lockers do list one in the 4x5 range, so a true 4x5 exists as a locker in a minority of locations.
How big is a 4x5 storage unit?
A 4x5 has a 4 ft by 5 ft floor, so 20 square feet, and about 160 cubic feet at the standard 8 ft ceiling. That is one fifth smaller than a 5x5 (25 sqft, 200 cubic feet) and roughly the footprint of a small walk-in closet.
What fits in a 4x5 storage unit?
About a closet's worth: a few moving boxes, a couple of suitcases, and a small piece of furniture like a chair or nightstand. Because you will almost always be renting a 5x5 instead, you get slightly more room in practice: five to eight medium boxes plus small furniture and seasonal items.
How much does a 4x5 storage unit cost?
Since a 4x5 search lands you on a 5x5 in nearly every market, the question is really what a 5x5 costs, and we do not publish a figure for that. No free public source supports one: operator listing pages carry live rates but are not ours to republish, and the industry rate datasets are subscription products. Get two or three quotes near you for the same week and ask each what the rate becomes in month two. A locker in the 4x5 range, where one exists, is usually the same band or a little less.
What is the difference between a 4x5 and a 5x5 storage unit?
A 5x5 has 25 square feet of floor; a 4x5 has 20. The 5x5 is the one operators actually stock and rent, so in practice the difference is academic: booking a 4x5 gets you a 5x5, five extra square feet, at the 5x5 price. Only if a facility rents lockers will you get an actual 4x5.
Is a 4 by 5 storage unit the same as a 4x5?
Yes. 4 by 5, 4 x 5 and 4x5 all mean a 4 ft by 5 ft footprint, 20 square feet. None of those spellings is a standard operator unit; each rounds to a 5x5 unless the facility rents lockers.