Choose the size for the job
Treat the unchanged crop as a starting point, then judge whether the source contains the detail you want at the new physical size. A high-contrast test section at actual scale can reveal more than a whole-image preview fitted into a small screen.
| Measurement | Value |
|---|---|
| Inches | 16 × 24 |
| Centimetres | 40.64 × 60.96 |
| Millimetres | 406.4 × 609.6 |
| Short-edge-to-long-edge ratio | 2:3 |
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 | 2,400 × 3,600 |
| 240 | 3,840 × 5,760 |
| 300 | 4,800 × 7,200 |
A worked example
A 6000 × 4000 image placed at 24 × 16 inches yields 250 PPI. A 7200 × 4800 image would yield 300 PPI. The second value is a different source-pixel requirement, not a claim that changing the first file’s metadata produces the missing detail.
Before you print
The long edge is 609.6 mm, which exceeds A2’s 594 mm edge. The fact that the 406.4 mm short edge fits within A2’s 420 mm width is not enough. For an actual-size single-sheet layout, select a larger supported paper or use a print provider that offers the specified format.