However the standard door handle size also considers the convenience of using it.
Standard door handle sizes.
There are also extensions for some brands like schlage that can extend the latch enough to have the lock located in the center of the door.
While the commercial door handle height is already 34 to 48 inch which standard you should install the knob and handle carefully if you choose to buy a slab door.
Standard exterior doors the standard size for an exterior door is 80 inches 6 feet 8 inches by 36 inches 3 feet.
Measure your existing door knobs from the floor up.
Dummy handles are surface mounted and may be located anywhere on the door you choose but they re usually located to match the appearance of nearby operating locks.
To measure your existing door you need to take a measuring tape and measure from the bottom of the door to the top of the door most common doors measure.
Next you need to determine which direction the door opens in out left right swings.
This creates a more harmonious appearance.
It is more important that your door handles be consistent than that they match the standard door handle height.
If they are more than inch off the standard height you will want to match all of the pre existing door handle heights in your home.
Then you need to measure the width most common width are 2 6.
Two standard backsets are 2 3 8 and 2 3 4.