About PrintSizeGuide
PrintSizeGuide.com is a free reference resource for standard print sizes, paper dimensions, and printing specifications. Our goal is to provide accurate, complete, and easy-to-use size data for anyone who needs to print photos, posters, documents, or any other material.
Our Data Sources
All measurements on this site are sourced from official standards and verified industry specifications:
- ISO 216 — International standard defining A-series and B-series paper sizes (A0–A10, B0–B10). First published in 1975, based on the German DIN 476 standard from 1922.
- ISO 269 — International standard defining C-series envelope sizes (C0–C10, DL).
- ANSI/ASME Y14.1 — American National Standard defining US engineering drawing sizes (ANSI A through ANSI E).
- US Government specifications — Passport photo requirements from the US Department of State, UK Home Office, and equivalent agencies for other countries.
- Industry standards — Photo print sizes, poster sizes, canvas sizes, and frame sizes are based on established US printing industry standards used by major print services.
Methodology
- Unit conversions are calculated mathematically: 1 inch = 25.4 mm = 2.54 cm. Pixel counts at a given DPI are calculated as: pixels = inches × DPI.
- ISO paper sizes are exact per the standard (e.g., A4 is exactly 210 × 297 mm).
- US paper sizes are exact per ANSI specifications (e.g., Letter is exactly 8.5 × 11 inches).
- Photo and poster sizes are US industry standards in whole inches.
- Price estimates in the Print Cost Calculator are based on average US market rates from major online print services and are updated periodically. They are estimates, not quotes.
Accuracy Commitment
We take data accuracy seriously. Every measurement on this site has been verified against its source standard. If you find an error in any of our data, please contact us so we can correct it immediately.
Contact
For corrections, suggestions, or inquiries: hello@printsizeguide.com