A10 Envelope (US) paper size
152.4 × 241.3 mm
6 × 9.5 inches · 15.24 × 24.13 cm · aspect ratio 1:1.58
A10 Envelope (US) size is 152.4 × 241.3 mm. Those are the A10 Envelope (US) dimensions a printer works to; the same sheet in centimetres, inches, points and pixels is below.
What A10 Envelope (US) is for
A10 Envelope (US) is 6 × 9½ inches, or 152.4 × 241.3 mm. The largest standard announcement envelope. It is exactly as long as a No. 10 business envelope and close to half again as wide, which is the quickest way to picture it.
A10 Envelope (US) dimensions in every unit
| Unit | Width | Height |
|---|---|---|
| Millimetres | 152.4 mm | 241.3 mm |
| Centimetres | 15.24 cm | 24.13 cm |
| Inches | 6 in | 9.5 in |
| Points (PostScript) | 432 pt | 684 pt |
A10 Envelope (US) in pixels
Pixel dimensions depend entirely on the resolution you are working at — there is no single "pixel size" for a sheet of paper. Every resolution, with file sizes and canvas setup →
| Resolution | Pixels | Use |
|---|---|---|
| 72 DPI | 432 × 684 | Screen preview only — far too coarse to print |
| 150 DPI | 900 × 1425 | Draft printing, internal documents |
| 300 DPI | 1800 × 2850 | The standard for commercial print |
| 600 DPI | 3600 × 5700 | 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 A10 Envelope (US) relates to the rest of the series
At 152.4 × 241.3 mm (6 × 9.5 inches) the aspect ratio is 1:1.583. US envelopes are not a halving series: each size is cut to hold a particular sheet or card, so the numbers step irregularly and nothing scales cleanly to anything else.
Of the standard sheets on this site, the largest that goes in flat is A5 at 148 × 210 mm, with a few millimetres to spare on each edge.
Folded, the largest standard sheet it takes is a Letter sheet folded in half.
About A10 Envelope (US)
6 × 9.5 inches. The largest standard US announcement envelope. Unrelated to ISO A10.
Other US envelope sizes sizes
| Size | Millimetres | Inches |
|---|---|---|
| Envelope No. 10 | 104.775 × 241.3 mm | 4.13 × 9.5 in |
| A7 Envelope (US) | 133.35 × 184.15 mm | 5.25 × 7.25 in |
| A1 Envelope (US) | 92.075 × 130.175 mm | 3.63 × 5.13 in |
| A2 Envelope (US) | 111.125 × 146.05 mm | 4.38 × 5.75 in |
| A6 Envelope (US) | 120.65 × 165.1 mm | 4.75 × 6.5 in |
| A8 Envelope (US) | 139.7 × 206.375 mm | 5.5 × 8.13 in |
| A9 Envelope (US) | 146.05 × 222.25 mm | 5.75 × 8.75 in |
| Envelope No. 6 3/4 | 92.075 × 165.1 mm | 3.63 × 6.5 in |
| Envelope No. 9 | 98.425 × 225.425 mm | 3.88 × 8.88 in |
| Envelope No. 11 | 114.3 × 263.525 mm | 4.5 × 10.38 in |
| Envelope No. 12 | 120.65 × 279.4 mm | 4.75 × 11 in |
| Envelope No. 14 | 127 × 292.1 mm | 5 × 11.5 in |
Frequently asked questions
What size is A10 Envelope (US) in mm?
152.4 × 241.3 mm.
What size is A10 Envelope (US) in inches?
6 × 9.5 inches.
What size is A10 Envelope (US) in pixels?
There is no single answer — it depends on resolution. At the print standard of 300 DPI it is 1800 × 2850 pixels; at 72 DPI it is only 432 × 684.