リソース

Legal paper keeps the same width as Letter but adds extra height, making it useful when you need more vertical writing space.

US Letter is the default North American office size and the starting point for many printable notes, graph sheets, and notebook pages.

A4 is the everyday ISO office and school size used across much of the world, especially where Letter is not the default.

A3 is the large ISO sheet used for posters, charts, proofs, and diagrams when A4 does not provide enough working area.

A2 is a poster-scale ISO sheet that gives four times the area of A4 and usually requires a print shop, plotter, or large-format copier.

A1 is a large ISO sheet used for posters, presentation boards, technical drawings, and other print-shop workflows.

A0 is the largest standard ISO A-series sheet and is used for full-size posters, charts, drawings, and large reference boards.

11×17 paper is the large-format size often called tabloid, especially when used in portrait orientation.

Ledger uses the same sheet as tabloid, but usually refers to the landscape orientation used for forms, accounting, and wider layouts.

Arch E is a 36x48 inch architectural sheet used for full-size plans, site drawings, engineering plots, and poster-scale review boards.

Long bond is a regional office and school size often treated as 8.5 x 13 inches, especially in Philippine document workflows.

Half Letter is exactly half of US Letter and is popular for compact notes, planners, booklets, and portable printables.

Index cards usually mean 3x5, 4x6, or 5x8 inch cards, with each size fitting a different study, recipe, or presentation workflow.