Paper Sizes Guide - CHL-STORE

Paper Sizes Guide

When selecting paper for various tasks, understanding the diverse world of paper sizes can be a daunting challenge. Whether you're printing a document, creating a design, or selecting a notebook, the right size can make all the difference. Here's an overview of the most common paper sizes used globally.

1. ISO A Series (International Standard)

The A series is perhaps the most widely recognized paper size standard worldwide, especially in countries using the metric system.

  • A0: 841 x 1189 mm
  • A1: 594 x 841 mm
  • A2: 420 x 594 mm
  • A3: 297 x 420 mm
  • A4: 210 x 297 mm (Most common for office documents)
  • A5: 148 x 210 mm
  • A6: 105 x 148 mm
  • ... and so forth down to A10.

The sizes in the A series are based on the golden ratio. If you fold an A4 in half, you get two A5 sheets.

2. ISO B Series

The B series caters to sizes that don't fit within the A series, providing intermediate sizes.

  • B0: 1000 x 1414 mm
  • B1: 707 x 1000 mm
  • ... down to B10.

3. ISO C Series

These sizes are often used for envelopes designed to fit A series paper.

  • C0: 917 x 1297 mm
  • C4: 229 x 324 mm (fits A4)
  • C5: 162 x 229 mm (fits A5)
  • ... and so on.

4. American Paper Sizes

In the US, the letter, legal, and ledger/tabloid are common formats:

  • Letter: 8.5 x 11 inches
  • Legal: 8.5 x 14 inches
  • Ledger/Tabloid: 11 x 17 inches

5. Japanese Paper Sizes

Japan has its own set of sizes, the most common being:

  • B Series: Similar dimensions to the ISO B series but with minor differences.
  • Shiroku ban: 257 x 364 mm
  • Kiku size: 227 x 306 mm

6. Business Cards

While business card sizes can vary depending on the country, the standard size in:

  • North America: 3.5 x 2 inches
  • Europe & Japan: 85 x 55 mm

Factors to Consider when Choosing Paper Size

  1. Purpose: Are you printing a brochure, a flyer, a book, or an academic paper? Each purpose may have an optimal size.
  2. Printing Machine: Some printers can't accommodate large sheets, like A2 or A1.
  3. Portability: If the document needs to be carried around, like a notebook or a planner, consider a size that's easy to transport.
  4. Visual Impact: For promotional materials like posters, larger sizes can be more eye-catching.
  5. Budget: Printing larger documents can be more expensive, both in terms of paper costs and printing costs.


Choosing the right paper size can influence the outcome and effectiveness of your task. Being familiar with standard sizes and their typical applications can help in making informed decisions, leading to professional and aesthetically pleasing results.