Envelope No. 12 paper size
120.65 × 279.4 mm
4.75 × 11 inches · 12.07 × 27.94 cm · aspect ratio 1:2.32
Envelope No. 12 size is 120.65 × 279.4 mm. Those are the Envelope No. 12 dimensions a printer works to; the same sheet in centimetres, inches, points and pixels is below.
What Envelope No. 12 is for
Envelope No. 12 is 4¾ × 11 inches, or 120.65 × 279.4 mm. A long business envelope for bulkier mailings. It is uncommon outside high-volume mail rooms, and most print shops will quote a lead time rather than stock it.
Envelope No. 12 dimensions in every unit
| Unit | Width | Height |
|---|---|---|
| Millimetres | 120.65 mm | 279.4 mm |
| Centimetres | 12.07 cm | 27.94 cm |
| Inches | 4.75 in | 11 in |
| Points (PostScript) | 342 pt | 792 pt |
Envelope No. 12 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 | 342 × 792 | Screen preview only — far too coarse to print |
| 150 DPI | 713 × 1650 | Draft printing, internal documents |
| 300 DPI | 1425 × 3300 | The standard for commercial print |
| 600 DPI | 2850 × 6600 | 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 Envelope No. 12 relates to the rest of the series
At 120.65 × 279.4 mm (4.75 × 11 inches) the aspect ratio is 1:2.316. 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 A6 at 105 × 148 mm, with a few millimetres to spare on each edge.
Folded, the largest standard sheet it takes is a Letter sheet folded in three.
About Envelope No. 12
4.75 × 11 inches. A long US business envelope for bulkier mailings.
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 |
| A10 Envelope (US) | 152.4 × 241.3 mm | 6 × 9.5 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. 14 | 127 × 292.1 mm | 5 × 11.5 in |
Frequently asked questions
What size is Envelope No. 12 in mm?
120.65 × 279.4 mm.
What size is Envelope No. 12 in inches?
4.75 × 11 inches.
What size is Envelope No. 12 in pixels?
There is no single answer — it depends on resolution. At the print standard of 300 DPI it is 1425 × 3300 pixels; at 72 DPI it is only 342 × 792.