Quick answer
Common single doors are 8×7, 9×7 and 9×8 ft; doubles are 16×7 and 16×8 ft. Measure width, height, headroom, side room and backroom before ordering — or let us measure free with garage door installation.
Replacement doors are built to the opening, so accurate measurements matter.
On this page
Standard sizes
- Single: 8×7, 9×7, 10×7, 9×8
- Double: 16×7, 16×8, 18×7
- RV/oversize: 10–12 ft tall
How to measure
- Opening width between jambs
- Opening height floor to header
- Headroom above the opening
- Side room each side
- Backroom depth
Headroom matters
Low headroom needs special tracks or a wall-mount opener.
Two singles or one double?
Two singles lose less if one fails; a double is cheaper and easier for wide cars.
Where Summit can help
Our technicians handle this every week across South and Southwest Florida. Local pages with scheduling and county details:
- garage door repair Marco Island
- garage door repair Punta Gorda
- garage door repair Homestead FL
- garage door repair Plantation FL
- garage door repair Coconut Creek
- garage door repair Tamarac
Questions people also ask
Can you change the opening size?
Yes, with framing and a permit.
Are Florida sizes different?
No, but ratings vary with size.
Is the estimate free?
Yes.