Before you shop, it helps to know the common sizes and how to measure — getting this right avoids a lot of headaches on install day.
Common single-car sizes
8×7 and 9×7 (feet, width × height) are the standards. Older homes lean 8-foot; newer builds often go 9-foot for a little more room.
Common double-car sizes
16×7 is the classic two-car door. Many newer DFW homes use 18×7 for wider bays, and 8-foot-tall doors show up on homes built for trucks and SUVs.
How to measure your opening
- Width & height of the finished opening (not the door itself).
- Side room — space on each side of the opening (need ~3.75 in. for tracks).
- Headroom — space above the opening to the ceiling.
- Backroom — depth from the opening into the garage.
Not sure? We'll measure it free
Every new-door install starts with a free on-site measure, so you never have to guess. Ballpark your size and style in the designer, then we confirm the exact fit before anything is ordered.
What the manufacturer lists for standard door sizes
Getting the size right is the first decision in any garage door project. The manufacturer's own spec sheet is specific about the common dimensions.
- Clopay lists the two most common single-car doors as 8 feet wide by 7 feet high and 9 feet by 7 feet. Clopay
- The standard double-car door is 16 feet wide by 7 feet high, per Clopay. Clopay
- Seven feet is the standard residential door height, and 8-foot-tall doors are widely available, per Clopay. Clopay
Sources: Clopay
Key takeaways
- Single-car standard: 8x7 or 9x7 feet; double-car standard: 16x7 (18x7 on newer builds).
- 8-foot-tall doors are common for trucks and SUVs.
- Measure the opening width/height plus side room, headroom, and backroom.
- Clearances decide what hardware fits — not just the opening size.
- A free on-site measure means you never have to guess.