The size and the shape
Turn the print to landscape and the same format becomes 10 × 8 inches. Orientation changes which edge is horizontal; it does not create a different print size. The ratios 8:10, 16:20, and 4:5 describe this same shape.
For a frame, check the visible opening as well as the advertised print size. A mount or frame lip can cover part of the edge. Keep essential detail away from that edge and use the actual opening if you need to plan a precise crop.
| Measurement | Value |
|---|---|
| Inches | 8 × 10 |
| Centimetres | 20.32 × 25.4 |
| Millimetres | 203.2 × 254 |
| Portrait aspect ratio | 4:5 |
Pixel examples for an 8 × 10 print
Multiply each edge in inches by the chosen PPI. At 300 PPI, this gives 2400 × 3000 pixels. These are planning examples, not universal quality thresholds: source sharpness, viewing distance, paper, and printing all affect the finished result.
| Example PPI | Portrait pixels |
|---|---|
| 150 | 1200 × 1500 |
| 240 | 1920 × 2400 |
| 300 | 2400 × 3000 |
A 4000 × 3000 photo in a landscape 10 × 8 frame
Fill the frame retains 3750 × 3000 pixels. The crop removes 250 pixels of width, or 6.25% of the original image area. A centred crop removes 125 pixels from each side. Moving the crop changes which edge loses pixels; the retained dimensions and 375 effective PPI stay the same.
Keep the whole photo places the image at 10 × 7.5 inches. The remaining 0.5 inch of height becomes two 0.25-inch borders when centred. All 4000 × 3000 pixels remain, at 400 PPI. Neither option stretches the image.
Choose the composition before ordering
Use the crop preview when a face, signature, or horizon sits near an edge. If the complete composition matters more than filling the opening, keep the photo and accept borders. If you later enlarge this crop to 16 × 20, its shape remains correct but the effective PPI halves.
The print dimensions describe the image rectangle, not a printer’s usable sheet area. To print at home, place that rectangle on a suitable sheet and check margins and actual-size settings in the layout guide.