Paper Size Reference Guide

What is a Paper Size Reference Guide?

Browse and search dimensions for standard international paper sizes: ISO 216 A-Series (A0 to A10), B-Series, C-Series envelopes, US North American sizes (Letter, Legal, Tabloid, Executive), and ANSI drafting sizes in mm, cm, and inches.

Why Use This Tool?

Graphic Design & Printing: Find exact millimeter or inch dimensions when setting up document print canvases in Illustrator or Photoshop.
Envelope Selection: Check which C-series envelope fits folded A4 or A5 documents.
International Standard Compliance: Compare US Letter (8.5x11 in) against ISO A4 (210x297 mm).

How to Use

Search or select Paper Family (ISO A-Series, US Sizes, Envelopes).
View dimensions table in Millimeters (mm), Centimeters (cm), and Inches (in).
Click any paper size to copy exact dimensions.

Real Working Example

Input:

Search: "A4"

Output Result:

ISO A4 Dimensions: 210 x 297 mm | 21.0 x 29.7 cm | 8.27 x 11.69 inches | Aspect Ratio: 1:1.414 (√2)

Important Technical Details & Formulas

ISO 216 Standard Specs: Complete database of official ISO 216 (A/B), ISO 269 (C envelopes), and ANSI paper standards.
Sqrt(2) Aspect Ratio Math: ISO A-series paper preserves 1:√2 aspect ratio when folded in half.
100% Offline Access: Embedded reference runs locally in browser memory.

Related Measurement & Time Tools

Unit Converter: Convert length and area.
DPI / PPI Calculator: Calculate print pixel density.
Aspect Ratio Calculator: Calculate aspect ratios.

Frequently Asked Questions

What are the exact dimensions of A4 paper?

A4 paper measures 210 x 297 mm (8.27 x 11.69 inches).

What is the difference between US Letter and A4 paper?

US Letter is wider and shorter (8.5 x 11 inches / 216 x 279 mm); A4 is narrower and longer (210 x 297 mm).

Which envelope size fits an A4 paper folded in half?

C5 envelopes fit A4 paper folded in half once (A5 size).

Is it free?

Yes, 100% free.

What is the main function of Paper Size Reference Guide?

Comprehensive dimensions reference for ISO A (A0-A10), ISO B, ISO C envelopes, US Letter, Legal, and Tabloid paper sizes in mm, cm, and inches. This tool processes paper size reference guide data 100% locally inside your web browser.