Each letter on the outer edges of the blue border represents the corresponding door that you would enter to access your unit (for example: to access unit J106, you would enter through door J). These doors are labeled at our facility to help navigating our property be as simple as possible. If you see a specific unit that you are wanting to rent, make note of the size of the unit and then select the size from the list above. If the unit is not listed in the drop down, it is already being rented.