DL Envelope Size
DL measures 110 × 220 mm (4.33 × 8.66 in). It is the standard business envelope, sized for an A4 letter folded in three, and the most produced envelope size in the world.
DL measures 110 millimetres wide and 220 millimetres tall.
DL Dimensions in Each Unit
DL is 110 × 220 mm, which is 11.0 × 22.0 cm or 4.33 × 8.66 in. The size is set by ISO 216.
| Unit | Width | Height | Width × height | Copy |
|---|---|---|---|---|
| Millimetres (mm) | 110 | 220 | 110 × 220 mm | |
| Centimetres (cm) | 11.0 | 22.0 | 11.0 × 22.0 cm | |
| Metres (m) | 0.11 | 0.22 | 0.11 × 0.22 m | |
| Inches (in) | 4.33 | 8.66 | 4.33 × 8.66 in | |
| Feet (ft) | 0.36 | 0.72 | 0.36 × 0.72 ft | |
| Points (pt) | 312 | 624 | 312 × 624 pt | |
| Picas (pc) | 26 | 52 | 26 × 52 pc | |
| Pixels at 72 DPI | 312 | 624 | 312 × 624 px | |
| Pixels at 150 DPI | 650 | 1299 | 650 × 1299 px | |
| Pixels at 300 DPI | 1299 | 2598 | 1299 × 2598 px | |
| Pixels at 600 DPI | 2598 | 5197 | 2598 × 5197 px |
Pixel counts follow from the resolution: pixels = millimetres ÷ 25.4 × DPI. More on the DPI and pixels page.
DL Shape and Area
| Aspect ratio | 1 : 2.000 |
|---|---|
| Area | 0.0242 m² · 24,200 mm² |
| Diagonal | 246 mm · 9.68 in |
| ISO 216 tolerance | ± 1.5 mm (110 mm side) · ± 2 mm (220 mm side) |
| Governing standard | ISO 216:2007 |
DL to Scale
Put DL next to another size in the comparison tool.
Frequently Asked Questions
What size is a DL envelope?
DL is 110 by 220 mm, or 4.33 by 8.66 inches.
What does DL stand for?
DL comes from Dimension Lengthwise, the German DIN Lang. It describes a long envelope for a lengthwise-folded letter.
What paper fits a DL envelope?
An A4 sheet folded in three, an A5 sheet folded once, or a one-third A4 compliment slip flat.
Is DL part of the C series?
No. DL is defined alongside the C series in ISO 216 but it is not a C size and does not keep the 1 : √2 shape.
Envelope Sizes
✓ Dimensions per ISO 216:2007; unit values derived by formula. Reviewed . Editorial Process →