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20 × 25 mm is a portrait 4:5 format (0.79 × 0.98 in). To print it sharply, the image needs about 236 × 295 pixels, which is 0.1 megapixels.
There is no widely used named standard at exactly this size, so the preset is useful when a printer, frame or form specifies it directly. Always check the dimensions given by whoever will print or receive the image.
| Output size | 20 × 25 mm |
|---|---|
| In other units | 0.79 × 0.98 in / 2 × 2.5 cm |
| Aspect ratio | 4:5 (portrait) |
| Pixels at 96 DPI (Auto) | 76 × 94 |
| Pixels at 300 DPI | 236 × 295 (0.1 MP) |
Related guide: Image Size for Printing: DPI, Pixels and Inches Explained
20 × 25 mm in pixels
Pixels = size in inches × DPI. DPI is a printing instruction, not a quality setting: it says how many pixels are spread over each inch of paper. With the DPI field on Auto, ResizeAny converts at 96 DPI, which suits screens. For print, set 300 DPI. JPG and PNG output stores the DPI value in the file.
| DPI | Use | Pixel size |
|---|---|---|
| 72 | Screen preview | 57 × 71 |
| 96 | Tool default (Auto) | 76 × 94 |
| 150 | Large posters, viewed from a distance | 118 × 148 |
| 300 | Photos, cards, anything held close | 236 × 295 |
Will your photo be sharp enough?
A 12-megapixel phone photo (4000 × 3000) has more than the 236 × 295 pixels this size needs at 300 DPI, so it can be printed sharply with room left to crop.
Needed source resolution: 0.1 megapixels or more at 300 DPI.
Matching the 4:5 shape
The output is 4:5. If your photo has another shape, it has to be cropped or it will be stretched. This is how much of each common photo is lost when cropped to fill 4:5:
| Starting photo | Cropped away to fill the shape |
|---|---|
| Phone photo (4000 × 3000, 4:3) | About 40% of the image |
| DSLR photo (6000 × 4000, 3:2) | About 47% of the image |
| Video frame (1920 × 1080, 16:9) | About 55% of the image |
| Portrait phone photo (3000 × 4000, 3:4) | About 6% of the image |
Related presets
Nearby sizes in this category
More 4:5 presets
More in this category: Print, Paper & Photo Sizes. For several photos at once, use the bulk image resizer.
Frequently asked questions
What is 20 × 25 mm in pixels?▼
What is 20 × 25 mm in other units?▼
Is a phone photo big enough for 20 × 25 mm?▼
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