A2 Envelope (US) paper size
111.125 × 146.05 mm
4.38 × 5.75 inches · 11.11 × 14.61 cm · aspect ratio 1:1.31
A2 Envelope (US) size is 111.125 × 146.05 mm. Those are the A2 Envelope (US) dimensions a printer works to; the same sheet in centimetres, inches, points and pixels is below.
What A2 Envelope (US) is for
A2 Envelope (US) is 4⅜ × 5¾ inches, or 111.125 × 146.05 mm. The standard reply-card and small-invitation envelope, and what a wedding stationer means by "A2". It is unrelated to ISO A2 paper at 420 × 594 mm; the two share a name and nothing else. An A2 envelope takes a 4¼ by 5½ inch card with a little room, which is why that card size is cut to match it.
A2 Envelope (US) dimensions in every unit
| Unit | Width | Height |
|---|---|---|
| Millimetres | 111.125 mm | 146.05 mm |
| Centimetres | 11.11 cm | 14.61 cm |
| Inches | 4.38 in | 5.75 in |
| Points (PostScript) | 315 pt | 414 pt |
A2 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 | 315 × 414 | Screen preview only — far too coarse to print |
| 150 DPI | 656 × 863 | Draft printing, internal documents |
| 300 DPI | 1313 × 1725 | The standard for commercial print |
| 600 DPI | 2625 × 3450 | 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 A2 Envelope (US) relates to the rest of the series
At 111.125 × 146.05 mm (4.38 × 5.75 inches) the aspect ratio is 1:1.314. 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 Index Card 3×5 at 76.2 × 127 mm, with a few millimetres to spare on each edge.
Folded, the largest standard sheet it takes is a Letter sheet folded in half and then in three.
About A2 Envelope (US)
4.375 × 5.75 inches. The US reply-card and invitation envelope. Unrelated to ISO A2 paper.
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 |
| 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. 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 A2 Envelope (US) in mm?
111.125 × 146.05 mm.
What size is A2 Envelope (US) in inches?
4.38 × 5.75 inches.
What size is A2 Envelope (US) in pixels?
There is no single answer — it depends on resolution. At the print standard of 300 DPI it is 1313 × 1725 pixels; at 72 DPI it is only 315 × 414.