How to Buy - Measuring
Measure the opening width (horizontally) as shown, referring to the following diagrams below. Take three measurements, one across the top, middle and bottom of the door (A, B, C). Record the narrowest dimension.
Measure the opening height (vertically) as shown (D). Record the shortest dimension.
Doorway Opening Size Guide
| Standard Door Sizes | Minimum-Maximum Doorway Width | Minimum-Maximum Doorway Height |
|---|---|---|
| 30" x 81" | 29-7/8" to 30-3/8" | 80" to 81" |
| 32" x 81" | 31-7/8" to 32-3/8" | 80" to 81" |
| 34" x 81" | 33-7/8" to 34-3/8" | 80" to 81" |
| 36" x 81" | 35-7/8" to 36-3/8" | 80" to 81" |
| 32" x 85" | 31-7/8" to 32-3/8" | 80" to 81" |
| 34" x 85" | 33-7/8" to 34-3/8" | 84" to 85" |
| 36" x 85" | 35-7/8" to 36-3/8" | 84" to 85" |
