Reference library
A10 Paper Size
A10 measures 26 x 37 mm, 2.6 x 3.7 cm, or 1.02 x 1.46 in. See pixel dimensions by DPI, aspect ratio, bleed setup, comparisons, and related tools.
Last checked: 2026-05-01
How we calculate this
Methodology and source handling
We convert physical sizes to inches, multiply by the selected DPI/PPI value, and round to whole pixels.
Quick answer
Copy-ready answer
A10 is 26 x 37 mm, 2.6 x 3.7 cm, or 1.02 x 1.46 in. At 300 DPI, A10 is 307 x 437 px.
Dimensions and specs
| Millimeters | 26 x 37 mm | |
|---|---|---|
| Centimeters | 2.6 x 3.7 cm | |
| Inches | 1.02 x 1.46 in | |
| 300 DPI pixels | 307 x 437 px | |
| Aspect ratio | 1:1.4231 | |
| Standard family | ISO A Series |
Pixels
Pixel dimensions by DPI
| DPI / PPI | Width | Height | Use |
|---|---|---|---|
| 72 DPI | 74 px | 105 px | Screen or draft reference density |
| 96 DPI | 98 px | 140 px | Screen or draft reference density |
| 150 DPI | 154 px | 219 px | Screen or draft reference density |
| 300 DPI | 307 px | 437 px | Common high-quality print setup |
| 600 DPI | 614 px | 874 px | High-resolution archival or print workflow |
Formula
How to calculate this size
26 mm x 300 PPI = 307 px wide.
Use this when the artwork stops at the finished edge.
Add 3 mm per side before calculating pixels when artwork reaches the edge.
Common mistakes
Avoid these a10 paper size problems
A paper size needs a PPI target before pixels mean anything for print.
Portrait and landscape use the same dimensions, but width and height swap in the export.
Paper pages show trim size first; add bleed only when the design prints to the edge.
Calculator
Calculate pixels and bleed
Enter any DPI to calculate the pixel dimensions for this physical size.
Compare
Compare A10 Paper Size
Open a curated comparison or send both sizes into the compare tool with a fragment URL.
- A10 Paper Size
- 26 x 37 mm
- A9
- 37 x 52 mm
- A10 Paper Size
- 26 x 37 mm
- A4
- 210 x 297 mm
Workflow
Use A10 Paper Size in a finished file
Copy the millimeter, centimeter, or inch dimensions for the selected paper standard.
Use 300 PPI for most sharp print exports, or match the printer requirement.
Multiply inches by PPI, then add bleed only when artwork reaches the trimmed edge.
Related
Related pages and tools
Same branch
Nearby pages
FAQ
Common questions
What is the exact A10 size?
A10 measures 26 x 37 mm, 2.6 x 3.7 cm, or approximately 1.02 x 1.46 in.
What is A10 in pixels at 300 DPI?
A10 at 300 DPI is 307 x 437 px when rounded to the nearest whole pixel.
What aspect ratio is A10?
A10 has an aspect ratio of about 1:1.4231 based on its 26 x 37 mm physical dimensions.
Should I add bleed to a A10 design?
For print work, a common starting point is 3 mm bleed on each side, making the document 32 x 43 mm before trimming. Confirm final bleed with your printer.
References
Sources and references
ISO 216 physical dimensions. Pixel values are calculated from millimeters / 25.4 x DPI and rounded to whole pixels.
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ISO 216:2007
Used for ISO A and B series physical paper dimensions.
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W3C CSS Values and Units Module
Used for CSS unit definitions, absolute unit relationships, and CSS px behavior.
Last checked: 2026-05-01