The short answer, by size
10' Standard — 560 cubic feet. The smallest we carry, good for overflow from a garage or shed, seasonal gear, or a small equipment lockup.
20' Standard — 1,172 cubic feet. Our most popular size — roughly enough to hold the contents of a one-bedroom apartment, or a vehicle plus a full set of gear around it.
20' High Cube — 1,318 cubic feet. Same footprint as the 20' Standard with an extra foot of headroom, useful for stacking pallets or storing anything tall.
40' Standard — 2,390 cubic feet. A full household move, multiple vehicles, or a contractor's complete tool and material inventory.
40' High Cube — up to 2,694 cubic feet. The largest we carry, and the one most warehousing and logistics operations reach for when they need real capacity on their own lot.
Standard or High Cube
The difference is one foot: 9'6" exterior height on a High Cube versus 8'6" on Standard, showing up almost entirely as extra headroom inside. Same footprint on the ground, same door width — just more room to stack, park equipment, or move around without ducking. We carry High Cube in both 20' and 40'.
By use case
Homeowners doing a renovation or decluttering before a move typically land on a 10' or 20' — enough room without paying for space they won't use. Contractors and builders usually want a 20' for a single active job site, moving up to a 40' when it's doubling as material staging for a bigger project. Farms tend toward 20' for equipment and feed, or 40' when it's also serving as a base for a full seasonal operation.
Not sure which is right? The exact interior and exterior numbers for every size are in our full dimension chart — worth checking against whatever you're planning to store before you commit.