Sizes
| Size (in) | Size (cm) | Ratio | Mpix | Shutterfly | Walgreens |
|---|---|---|---|---|---|
| 4 x 5.3 | 10.2 x 13.5 | 40:53 | Print. No pixel size published. | Not listed. | True Digital print. No pixel size published. |
| 4 x 6 | 10.2 x 15.2 | 2:3 | Print. 400 x 600 minimum, 1000 x 1500 optimal. | Print. 640 x 480 minimum, 1024 x 768 listed for 4x6. | Print. 540 x 360 minimum. |
| 5 x 7 | 12.7 x 17.8 | 5:7 | Print. 500 x 700 minimum, 1250 x 1750 optimal. | Print. 1152 x 864 recommended. | Print. 630 x 450 minimum. |
| 6 x 8 | 15.2 x 20.3 | 3:4 | Not listed. | Not listed. | Print. No pixel size published. |
| 8 x 10 | 20.3 x 25.4 | 4:5 | Print. 800 x 1000 minimum, 2000 x 2500 optimal. | Print, Poster. 1600 x 1200 recommended. | Print. 900 x 720 minimum. |
| 5 x 15 | 12.7 x 38.1 | 1:3 | Print. 500 x 1500 minimum, 1250 x 3750 optimal. | Print. No pixel size published. | Not listed. |
Centimetres use 1 inch = 25.4 mm (NIST), to one decimal place. Ratios are short side first.
Sources, read 22 October 2026: Mpix prints, pixel guide; Shutterfly prints, pixel guide, posters; Walgreens Photo prints, pixel guide, developer page.
How to use the tool
- Add a photo, or drop one on the box.
- Pick a print size, then drag and zoom the crop.
- Read how large it prints at 300 ppi and download a JPG or a PNG.
Each lab's print menu
Mpix lists minis, wallets, prints and panoramic prints such as 5 x 15 and 12 x 36.
Shutterfly lists 4 x 4, 4 x 6, 5 x 7, 8 x 8, 8 x 10, 11 x 14, 12 x 12, 16 x 20 and 20 x 30, panoramic 5 x 15, 8 x 24 and 12 x 36, and 2.5 x 3.5 wallets.
Walgreens Photo lists 4 x 4, 4 x 5.3, 4 x 6, 5 x 7, 6 x 8, 8 x 8 and 8 x 10, and 2 x 3 wallets. All Walgreens photo prints are borderless.
Questions
Is it private?
Yes. The crop runs in your browser and nothing is uploaded. The HEIC decoder downloads once, when you first add a HEIC photo.
Why 300 ppi?
It is the labs' figure. Mpix recommends 250-300 DPI, Walgreens at least 200 PPI (its developer page says 300 DPI), and Shutterfly 300 dpi or higher for scans. The tool divides your pixels by 300.
HEIC decoding uses heic-to and libheif, free software licensed under the GNU LGPL 3.0. They are included unmodified as a separate file, loaded only when you add a HEIC photo. The source code is at the links above.