Photo 16×20 paper size
406.4 × 508 mm
16 × 20 inches · 40.64 × 50.8 cm · aspect ratio 1:1.25
Photo 16×20 size is 406.4 × 508 mm. Those are the Photo 16×20 dimensions a printer works to; the same sheet in centimetres, inches, points and pixels is below.
It is written 16x20 and 16 by 20 as often as 16×20 — the same sheet however it is typed. Sizes named by their inches like this one get asked for by the numbers rather than by a letter code, which is why the spelling varies and the sheet does not.
What Photo 16×20 is for
16 × 20 inches is a 4:5 wall print, the large end of what is commonly stocked as a ready-made frame. At this size print resolution starts to matter: 300 DPI needs a 4800 × 6000 pixel file, which is more than a 24-megapixel camera produces after a 4:5 crop, so most 16 × 20 prints are made at 200–240 DPI and look perfectly sharp at normal viewing distance.
Photo 16×20 dimensions in every unit
| Unit | Width | Height |
|---|---|---|
| Millimetres | 406.4 mm | 508 mm |
| Centimetres | 40.64 cm | 50.8 cm |
| Inches | 16 in | 20 in |
| Points (PostScript) | 1152 pt | 1440 pt |
Photo 16×20 in pixels
Pixel dimensions depend entirely on the resolution you are working at — there is no single "pixel size" for a sheet of paper. Photo 16×20 size in pixels has every resolution, with file sizes and canvas setup.
| Resolution | Pixels | Use |
|---|---|---|
| 72 DPI | 1152 × 1440 | Screen preview only — far too coarse to print |
| 150 DPI | 2400 × 3000 | Draft printing, internal documents |
| 300 DPI | 4800 × 6000 | The standard for commercial print |
| 600 DPI | 9600 × 12000 | Fine detail, line art, archival scanning |
Setting up a print document? Use 300 DPI and add 3 mm of bleed on every edge unless your printer specifies otherwise.
How Photo 16×20 relates to the rest of the series
At 406.4 × 508 mm (16 × 20 inches) the aspect ratio is 1:1.250. This size is not part of a halving series, so there is no fixed scaling factor to the next size up or down — each one is defined on its own terms.
The closest ISO sheet by area is A2 at 420 × 594 mm — this size is 17% smaller. The proportions differ, though: A2 is 1:1.414 like every A size, and this one is 1:1.250, so content laid out for one does not fill the other without cropping or white space.
About Photo 16×20
16 × 20 inches, a 4:5 wall print.
Other Photo prints sizes
| Size | Millimetres | Inches |
|---|---|---|
| Photo 4×6 | 101.6 × 152.4 mm | 4 × 6 in |
| Photo 5×7 | 127 × 177.8 mm | 5 × 7 in |
| Photo 8×10 | 203.2 × 254 mm | 8 × 10 in |
| Photo 6×8 | 152.4 × 203.2 mm | 6 × 8 in |
| Photo 8×12 | 203.2 × 304.8 mm | 8 × 12 in |
| Photo 11×14 | 279.4 × 355.6 mm | 11 × 14 in |
Frequently asked questions
What size is Photo 16×20 in mm?
406.4 × 508 mm.
What size is Photo 16×20 in inches?
16 × 20 inches.
What size is Photo 16×20 in pixels?
There is no single answer — it depends on resolution. At the print standard of 300 DPI it is 4800 × 6000 pixels; at 72 DPI it is only 1152 × 1440.