The "size of paper" refers to standard dimensions used for different types of paper, with common systems including the ISO A-series (used internationally) and North American sizes.
ISO A-Series Paper Sizes
- The A-series is based on a logical system of sizes where A0 is one square meter (841 x 1189 mm), and each subsequent size (A1, A2, A3, A4, etc.) is half the size of the previous one.
- For example, A4 is the most common size internationally, measuring 210 x 297 mm (8.27 x 11.7 inches).
Common North American Paper Sizes
- Letter size: 8.5 x 11 inches (216 x 279 mm)
- Legal size: 8.5 x 14 inches (216 x 356 mm)
- Ledger (Tabloid) size: 11 x 17 inches (279 x 432 mm)
- These sizes are prevalent in the United States, Canada, and the Philippines.
The size of paper depends on the standard being referred to, with ISO A-series and North American sizes being the most widely known.
