Guide
Garage door sizes chart
Every standard size, its width and height in feet and inches, the rough opening it needs and what fits through it. Print it or measure against it.
A 16x7, drawn to scale. Two normal cars side by side. The most common double door in America.
| Size | Rough opening | Steel, installed |
|---|---|---|
| 16x7 | 16'0" × 7'0" | $3,240 |
| 10x10 | 10'0" × 10'0" | $5,970 |
| 8x7 | 8'0" × 7'0" | $3,170 |
| 9x7 | 9'0" × 7'0" | $3,170 |
| 10x8 | 10'0" × 8'0" | $3,170 |
| 16x8 | 16'0" × 8'0" | $3,240 |
| 12x10 | 12'0" × 10'0" | $6,390 |
| 12x12 | 12'0" × 12'0" | $6,390 |
| 10x7 | 10'0" × 7'0" | $3,170 |
| 18x7 | 18'0" × 7'0" | $3,240 |
| 18x8 | 18'0" × 8'0" | $3,240 |
| 12x7 | 12'0" × 7'0" | $3,170 |
| 20x10 | 20'0" × 10'0" | $6,390 |
| 20x8 | 20'0" × 8'0" | $6,390 |
| 20x12 | 20'0" × 12'0" | $6,390 |
Guide ranges, checked September 2026. Prices move — get it in writing.
The part that surprises people
A bigger opening barely changes the door price. On a working contractor's current list a 10x7 and a 16x7 in the same model are the same money, and an 18x8 is about $200 more. What moves the number is the model — panel style, insulation and overlay — where the same 16x8 opening runs $1,368 in basic steel, $5,163 in steel overlay and $13,428 in wood overlay.
Framing
Rough opening and clearances
For a sectional door the rough opening equals the door size exactly. A 16x7 door needs a 16'0" wide by 7'0" high finished opening.
| Clearance | Minimum | Why |
|---|---|---|
| Headroom, standard torsion | 12" | Between the top of the opening and the ceiling. |
| Headroom, low-clearance kit | 4.5" | Costs more and needs a different spring assembly. |
| Sideroom, each side | 3.75" | For the vertical track. 5.5" if the opener rail is side-mounted. |
| Backroom | door height + 18" | Add another 24" for a ceiling-mounted opener. |
Exact price
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