gloryirondoors

Measuring Guide

Select the correct size for your door

How Do I Measure My Iron Door?

Ready to enhance your home or business with an iron door? While we recommend working with a professional builder or contractor for accurate measurements and installation, here’s a simple guide to help you understand the basics of measuring for iron doors.

All our iron door sizes are referred to as the net frame size or unit size. This represents the complete door system, which includes the header jamb, side jambs, and threshold.


Overview for Jamb Size, Rough Opening Size and Door Size (Net Frame Size)

 

The jamb size refers to the thickness of the wall into which the door unit will be installed. This measurement includes any sheetrock or exterior sheathing/siding. The most common jamb sizes are 4 9/16", 6", and 6 9/16", but we can also accommodate custom jamb sizes upon request.

The rough opening size refers to the wall opening created to fit a door. It is usually slightly larger than the actual door size to leave space for proper installation.

 

How to Measure for Iron Doors

Step 1: Measure the Width

  • Measure the distance between the left and right sides of the rough opening.

  • Take three measurements: top, middle, and bottom.

  • Record the smallest measurement.

Step 2: Measure the Height

  • Measure from the floor (or subfloor) to the top of the rough opening.

  • For square top doors, take two height measurements—one on the left side and one on the right side.
    If the door has an arch or round top, measure from the floor to the highest point.

  • Record the smallest measurement.

Step 3: Confirm the Depth (Jamb Size)

  • Measure the thickness of the wall where the door will be installed.

  • Include any sheetrock, sheathing, or siding.

  • Choose from our standard jamb sizes (4 9/16", 6", 6 9/16") or request a custom size.

Step 4: Calculate the Door Size

  • The rough opening should be about 1" wider and 1/2" taller than the door frame (unit) size.

Example:
Rough Opening: 73" x 96 1/2" → Door Size: 72" x 96"

Step 5: Double-Check

  • Always verify your measurements before placing an order.

  • For best results, we recommend having a professional contractor measure and confirm the opening.

 

Here is door drawing for your reference:

As below drawing shown, the overall door size is 72"x96", and you will find the size on our finished door.       

If you have any questions or concerns, feel free to contact us. 
Call us at 866-866-5020
Email: info@gloryirondoors.com