How To Measure The Door Size?

Purpose: To standardize and guide the door and window size measurement methods, and provide accurate data for design and production.

Door opening size refers to the size of the door opening without a door installed, including door opening width, door opening height, and wall thickness; the unit is generally expressed in millimeters.

Please measure size as below and let us know:

Take three measurements inside the door frame – at the top, middle and bottom. The widest measurement determines the width of the door. Use a tape measure to understand the width of the three areas of the door frame. Run the tape measure along the width of the frame from the left to the right and record these numbers. The same way to measure the height.