A3 paper measures about 11.7 inches by 16.5 inches (11.69″ × 16.54″, rounded).
Quick Scoop
- Width: 11.7 inches (short edge).
- Height: 16.5 inches (long edge).
- In more precise terms, many printing specs list it as 11.69″ × 16.54″.
If you imagine it, an A3 sheet is roughly the size of two A4 sheets placed side by side , which is why it’s popular for posters, menus on stands, and charts that need a bit more space.
TL;DR: If you’re setting up a design or telling a printer your size in inches, use 11.7″ × 16.5″ as the standard A3 dimensions.
Information gathered from public forums or data available on the internet and portrayed here.
