What Size Is A1 Paper?
A1, part of the Numbered / Announcement under the US Envelope Paper Sizes group, measures 92 x 130 mm, which is 9.2 x 13.0 cm or approximately 3.62 x 5.12 inches. It follows the US Envelope Standard specification and has an area of approximately 0.012 m².
A1 Paper Size Dimensions & Conversions
A1 Dimensions in Different Units
| Unit | Width | Height |
|---|---|---|
| Millimeters | 92 mm | 130 mm |
| Centimeters | 9.2 cm | 13.0 cm |
| Inches | 3.62 in | 5.12 in |
| Feet | 0.3 ft | 0.43 ft |
| Meters | 0.092 m | 0.13 m |
| Points | 261 pt | 369 pt |
| Picas | 21.7 pc | 30.7 pc |
What Is A1 Paper Used For?
Mailing Correspondence
This envelope size is used for business mail, invitations, or announcements depending on its category.
Design and Layout
Designers and print professionals use A1 when a layout calls for this specific format.
Reproduction and Scaling
A1 can be scaled up or down to produce related sizes in the same series.
Presentations and Displays
A1 is suitable for boards, handouts, or displays sized to this format.
Archiving and Filing
Printed materials in A1 are stored and filed using standard folders sized for this format.
Digital Reference
A1 dimensions are used as a page-size preset in design and publishing software.