A3+
Dimensions: 329 × 483 mm (12.95 × 19.02 in)
A3+ measures 329 × 483 mm (12.95 × 19.02 in) and belongs to the ISO 216 standard. It is commonly used for photo prints larger than a3.
What size is A3+ paper?
An A3+ piece of paper measures 329 × 483 mm or 12.95 × 19.02 inches. It is part of the A Paper Sizes standard.
| Units | Width × Height |
|---|---|
| Metric millimeters (mm) | 329 × 483 mm |
| Metric centimeters (cm) | 32.90 × 48.30 cm |
| Metric meters (m) | 0.329 × 0.483 m |
| Imperial inches (in) | 12.95 × 19.02 in |
| Typographic points (1/72 inch) (pt) | 932.60 × 1369.13 pt |
| Typographic picas (1/6 inch) (pc) | 77.72 × 114.09 pc |
| Pixels at 300 DPI (px) | 3,886 × 5,705 px |
A3+ is part of the a paper sizes standard. The A series traces its standardised dimensions to DIN 476, published in Germany in 1922. Georg Christoph Lichtenberg had described the underlying square-root-of-two aspect-ratio principle in 1786. ISO 216 brought the A and B trimmed-paper formats into an international standard in 1975; numbered A sizes retain approximately the same proportions as each sheet is halved.
Quick facts
- Size (mm)329 × 483 mm
- Size (inches)12.95 × 19.02 in
- Aspect ratio1 : √2 (≈ 1.414)
- StandardISO 216
- Common useDocuments, letters, forms
Compare A3+ with other sizes
Typical uses for A3+
A3+ measures 329 × 483 mm (12.95 × 19.02 in) and is used for the following tasks.
- Photo prints larger than A3
- Inkjet proofs and contact sheets
- Small posters and notices
- A3 layouts with bleed and crop marks
Printer tip
Most desktop printers cannot feed A3+. Use a wide-format device or a print shop, and confirm the driver offers this exact size rather than a scaled substitute.
A3+ at common DPI
Pixel dimensions for A3+ at popular resolutions. Rounded to whole pixels; physical sheet remains 329 × 483 mm.
| DPI | Width (px) | Height (px) |
|---|---|---|
| 72 | 933 | 1,369 |
| 96 | 1,243 | 1,826 |
| 150 | 1,943 | 2,852 |
| 300 | 3,886 | 5,705 |
| 600 | 7,772 | 11,409 |
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329 × 483 mm (12.95 × 19.02 in)