The thickness from one side of the door to the other side of the door.
Most new interior doors come with a standard 1 3/8" thickness.
Most new exterior doors ccome with a standard 1 3/4" thickness.
MyKnobs.com offers a wide selection of functional door hardware to fit all your needs.
To choose the door knob that is right for you check out our Door Hardware Function Guide. This will help you determine what type of door knob you need, such as a privacy, passage, dummy or keyed door lock.
Our customer service specialists are here to assist you 7 days a week with any questions. If you are in the New York area stop by and visit our showroom.