International paper and envelope size reference

Tool powered by Paper Sizes on papersizes.io.

Paper size chart on papersizes.io: envelope sizes, photo sizes, legal and tabloid dimensions, A5 paper, ISO A/B series, and mm or inch conversions.

What is papersizes.io?

Paper Sizes (https://papersizes.io/) is a reference for international paper dimensions—ISO A and B series, US Letter and Legal, envelopes, photography formats, and unit conversions in mm, cm, inches, and points. Teams searching for envelope sizes, photo sizes, legal size paper dimensions, or tabloid paper size comparisons use category pages such as /international-envelope/, /photography/, and /us/legal/. This page includes the official site for quick lookup during print and layout work. This site does not host the size database.

What papersizes.io offers

Paper size chart for envelope sizes, photo sizes, legal and tabloid dimensions, A5 paper, and mm or inch conversion.

  1. Envelope sizes and dimensions: International and US envelope tables for mail, packaging, and print templates—paths like /international-envelope/.

  2. Photo sizes and picture sizes: Photography format dimensions in mm and inches for print and digital workflows.

  3. Legal, Letter, and tabloid paper: Confirm legal size paper dimensions, US Letter, and tabloid paper size against A3 and related ISO entries.

  4. A5 paper and ISO A/B series: A4, A5, A3, and B formats with width and height for notebooks, flyers, and booklet imposition.

  5. Paper size chart and unit conversion: Convert between mm, cm, inches, and points for design and production handoff.

How to use this reference

Open the matching papersizes.io chart—envelopes, legal, A5, or photography—then copy dimensions into your layout tool.

  1. Pick the right family

    Start with envelopes, ISO A, US, or photography depending on your deliverable.

  2. Open the matching papersizes.io page

    Use in-page navigation to envelope sizes, legal dimensions, or A5 paper entries.

  3. Copy dimensions in your unit

    Paste mm or inch values into InDesign, Figma, or production briefs.

  4. Add bleed and margins separately

    Paper dimensions are trim size—extend artboard for bleed per your print vendor.

  5. Open papersizes.io in a new tab if needed

    Compare pages and deep links may work better outside a restricted iframe.

Tips for accurate print setup

Standards differ by region.
  • 01

    Confirm region before layout

    A4 and US Letter are not interchangeable—pick the standard your audience expects.

  • 02

    Match units to the tool

    Use mm for print specs; px only when converting at a stated DPI.

  • 03

    Check portrait versus landscape

    Swap width and height when orientation changes even if the format name stays the same.

  • 04

    Document envelope and insert pairs

    Folded inserts must fit envelope sizes—verify both in the chart.

Who this is for

Print, product, and documentation workflows.

  1. Print and packaging designers: Set trim sizes, envelopes, and dielines from a trusted chart.

  2. Document template authors: Configure Legal, Letter, or A4 templates with correct paper dimensions.

  3. Photography and lab workflows: Reference photo sizes before ordering prints or building galleries.

  4. Global product teams: Compare international paper sizes when shipping multi-region collateral.

Why open Paper Sizes

Official reference without replacing papersizes.io.

  • Stable directory path

    Link `/papersizes` in specs; Hero attribution points to papersizes.io.

  • Broad format coverage

    Envelopes, ISO, US, and photography in one publisher domain.

  • This site does not host the database

    Charts update on papersizes.io; we include and document honest use.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.