Easy Backing 12x30 units are 12Feet Wide and 30 Ft Deep. They have a 10Ft. wide Roll up Door that is 12 Ft. tall. There is electric in the unit. The easy Backing 12X30's have an abundance of space to back. They have a straight shot down an isle that can give you as much space as you need to get straight and back up. You will need a Disc locks for one of these Units.

Economy 12 X 30 units are 12 Feet Wide and 30 Ft Deep. They have a 10 Ft. wide Garage Door that is 12 Ft. tall.
You will need to provide a Disc lock for them. There is electric in your unit. There only about a 35 ft isle way so not a lot of space for backing a trailer or something like that. Economy units would be more for the normal storage rather than something that would need to be backed into the unit.

Normal 12 X 30 units are 12 Feet Wide and 30 Ft Deep. They have a 10 Ft. wide Roll Up door that is 12 Ft. tall.
You will need to provide a Disc lock for these units. There is electric in your unit. There is at least 45 ft isle for these units.

13x30 units are 13 Ft. Wide and 30 Ft. Deep. They have an 11 Ft. door. There is Electric in the unit. There is at least 45 feet of backing space for these units.

14X30 units are 14 Feet Wide and 30 Ft Deep. They have a 12 Ft. wide Garage Door that is 12 Ft. tall. There is Electric in the unit. The Isle is 45 feet or bigger.

14X30 units are 14 Feet Wide and 30 Ft Deep. They have a 12 Ft. wide Garage Door that is 12 Ft. tall. There is Electric in the unit. These units have between 35-40 feet of backing space. These units would be more for packing instead of backing something into it.

14x40 Units are 14 Ft Wide and 40 Ft. deep. They have a 12 Foot wide Garage Door that is 14 Ft. Tall. There is a key pad entrance to get into the unit with Electricity inside. The isle is 75 ft.

14X50 units are 14 Feet Wide and 50 Ft Deep. They have a 12 Ft. wide Garage Door that is 14 Ft. tall. There is a Key Pad Entrance to your unit with Electric in your unit. The isle is 75 ft.