Door sizes to check before you buy
A door that's wrong by an inch is a big job, so measure first.
- Most front doors are 36 inches wide and 80 inches tall [1].
- Measure the rough opening, not the old door, and take several measurements, since openings aren't always square. Use the largest [1].
Every picture is a preview made by AI at a believable size, not a measurement. How to check the size before you buy.
Sources
- Standard door sizes, Bob Vila. Read October 27, 2026.