Paper Size Reference
Complete reference for standard paper sizes — ISO A, ISO B, JIS B (Japan), and US sizes. View dimensions in mm, cm, or inches. Includes ID photo and resume photo sizes.
| Size | Dimensions (W × H) | Common Use |
|---|---|---|
| A0 | 841 × 1189 | |
| A1 | 594 × 841 | |
| A2 | 420 × 594 | |
| A3 | 297 × 420 | Posters, drawings, large prints |
| A4 | 210 × 297 | Office documents, printing (most common) |
| A5 | 148 × 210 | Notebooks, booklets, flyers |
| A6 | 105 × 148 | |
| A7 | 74 × 105 | |
| A8 | 52 × 74 |
How to Use
Select a unit
Choose mm, cm, or inches. The table updates immediately.
Select a series
Switch between A Series, ISO B, JIS B (Japan), US Sizes, or ID Photo to find the paper format you need.
Read the dimensions
Check the width × height in your selected unit. The note column shows common use cases for each size.
FAQ
A4 is 210 × 297 mm (8.27 × 11.69 inches). It is the most widely used paper size for office documents, printing, and business letters worldwide, except in North America where Letter (216×279mm) is standard.
JIS B4 is 257×364mm while ISO B4 is 250×353mm — they have different dimensions. Japan uses JIS B series for standard office and printing paper. ISO B is used in Europe and most other countries. When buying B5 paper in Japan, expect JIS B5 (182×257mm).
The standard resume photo size in Japan is 30×40mm. Some formats specify 33×48mm. Passport and My Number card photos require 35×45mm. Always check the specific document's requirements before having photos taken.
A4 (210×297mm) is taller but slightly narrower than US Letter (216×279mm). When printing A4-formatted documents on Letter paper, content may be cut off at the bottom. Most modern printers and software can scale automatically.