Half Letter paper size
139.7 × 215.9 mm
5.5 × 8.5 inches · 13.97 × 21.59 cm · aspect ratio 1:1.55
Half Letter in every unit
| Unit | Width | Height |
|---|---|---|
| Millimetres | 139.7 mm | 215.9 mm |
| Centimetres | 13.97 cm | 21.59 cm |
| Inches | 5.5 in | 8.5 in |
| Points (PostScript) | 396 pt | 612 pt |
Half Letter in pixels
Pixel dimensions depend entirely on the resolution you are working at — there is no single "pixel size" for a sheet of paper.
| Resolution | Pixels | Use |
|---|---|---|
| 72 DPI | 396 × 612 | Screen preview only — far too coarse to print |
| 150 DPI | 825 × 1275 | Draft printing, internal documents |
| 300 DPI | 1650 × 2550 | The standard for commercial print |
| 600 DPI | 3300 × 5100 | 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.
About Half Letter
5.5 × 8.5 inches — Letter folded once. Used for booklets, planners and small notepads.
Letter vs A4
Letter is 6 mm wider and 18 mm shorter than A4. That small difference is why a PDF laid out for A4 prints with clipped edges or unexpected margins on US paper, and why "Fit to page" exists in every print dialog. There is no scaling factor that makes them match — the aspect ratios genuinely differ (1:1.294 for Letter, 1:1.414 for A4).
Other North American sizes
| Size | Millimetres | Inches |
|---|---|---|
| Letter | 215.9 × 279.4 mm | 8.5 × 11 in |
| Legal | 215.9 × 355.6 mm | 8.5 × 14 in |
| Tabloid | 279.4 × 431.8 mm | 11 × 17 in |
| Executive | 184.15 × 266.7 mm | 7.25 × 10.5 in |
| Junior Legal | 127 × 203.2 mm | 5 × 8 in |
| ANSI C | 431.8 × 558.8 mm | 17 × 22 in |
| ANSI D | 558.8 × 863.6 mm | 22 × 34 in |
| ANSI E | 863.6 × 1117.6 mm | 34 × 44 in |
Frequently asked questions
What size is Half Letter in mm?
139.7 × 215.9 mm.
What size is Half Letter in inches?
5.5 × 8.5 inches.
What size is Half Letter in pixels?
There is no single answer — it depends on resolution. At the print standard of 300 DPI it is 1650 × 2550 pixels; at 72 DPI it is only 396 × 612.