---
title: "DL envelope size — 220 × 110 mm"
description: "DL envelope: 220 × 110 mm — fits A4 folded into three. Full dimensions in millimetres, centimetres and inches, and what the standard actually specifies."
url: https://atoneplace.net/size/dl-envelope/
site: "At One Place"
---

# DL envelope size

**DL envelope: 220 × 110 mm**

220 × 110 mm — fits A4 folded into three.

The commonest business envelope outside North America. It takes an A4 sheet folded twice into three, which is why the fold is standard on letterheads. DL is not part of the A or B series despite being used with them — it comes from the older German DIN Lang format.

## The numbers

- **Millimetres:** 220 × 110
- **Centimetres:** 22.0 × 11.0
- **Inches:** 8.66 × 4.33
- **Aspect ratio:** 2.0000 : 1
- **Area:** 0.0242 m²
- **Defined by:** ISO 269

## Envelope sizes

| Size | Millimetres | Inches |
| --- | --- | --- |
| C4 envelope | 229 × 324 mm | 9.02 × 12.76 |
| C5 envelope | 162 × 229 mm | 6.38 × 9.02 |
| DL envelope ← | 220 × 110 mm | 8.66 × 4.33 |

## Common questions

### What size is DL envelope?

220 × 110 mm — fits A4 folded into three.

### Which standard defines DL envelope?

ISO 269

## Related pages

- [C4 envelope size](https://atoneplace.net/size/c4-envelope/)
- [C5 envelope size](https://atoneplace.net/size/c5-envelope/)

## Sources

- Official vendor product documentation — At One Place (/about/)