A4 vs A3 Printing: Which Size Should You Choose?

Synthetic preparation worksheet v1 — 25 October 2026. Not a physical sample, app screenshot, certification or fulfilled order.

Mixed orientation: choose the output for the difficult page

Example: a report has portrait text pages and one landscape A3 schedule. Reducing the schedule to landscape A4 uses about 70.7% linear scale; 10-point table text becomes about 7.07 points. Keeping the schedule A3 retains its intended type size, but creates a mixed-size assembly requirement.

A useful before/after redesign is not just enlargement: before, twelve narrow columns with repeated labels; after, two six-column tables with the identifying column repeated. The second layout may remain readable on A4 without a foldout. Inspect both exported pages rather than assuming fewer sheets is better.

Confirm mixed-size handling before uploading

Acrobat auto-orientation can choose portrait or landscape per page, but that is different from a printer using different paper sizes. Send the page positions that need A3 and ask how they will be supplied or bound. The standard size selector should not be read as automatic mixed-size fulfilment.

Record your decision

• ☐ Landscape pages inspected separately — Notes: ____________________
• ☐ Smallest table labels checked after scaling — Notes: ____________________
• ☐ Mixed-size assembly explicitly confirmed — Notes: ____________________

Approved filename/revision: ____________________

Reviewer/date: ____________________