Choose the size for the job
A wide frame can suit a scene whose important detail runs horizontally. Check the horizon, nearby foreground, and any subject near the top or bottom before committing: filling a panoramic shape usually removes height from a less elongated source.
| Measurement | Value |
|---|---|
| Inches | 10 × 20 |
| Centimetres | 25.4 × 50.8 |
| Millimetres | 254 × 508 |
| Short-edge-to-long-edge ratio | 1:2 |
Pixel examples
These examples multiply each edge in inches by the stated PPI. They describe pixel counts for the chosen size, not a universal pass or fail rule for appearance. Use the retained pixels after cropping when checking an existing photo.
| Example PPI | Pixels |
|---|---|
| 150 | 1,500 × 3,000 |
| 240 | 2,400 × 4,800 |
| 300 | 3,000 × 6,000 |
A worked example
A 6000 × 4000 landscape image filling a 20 × 10 print retains 6000 × 3000 pixels. That produces 300 PPI and removes 25% of the original area. A centred crop removes 500 pixels from the top and bottom. Keeping the entire image instead gives a 15 × 10 inch picture with 2.5-inch borders on the left and right.
Before you print
The long edge is 508 mm, beyond A3’s 420 mm. A2 can contain it in landscape, but printer margins and the chosen background still need checking. Do not confuse a panoramic shape with a guarantee that the source contains enough horizontal content to fill it well.