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Common Aspect Ratios
A-Series Paper Formats
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About Aspect Ratios
Common Ratios
- 16:9 - Standard HD video and modern displays
- 4:3 - Classic TV and computer monitors
- 21:9 - Ultra-wide cinema and gaming displays
- 1:1 - Square format (Instagram posts)
- 16:10 - Common for laptops and tablets
A-Series Paper
- A4 - 210mm × 297mm (Most common document size)
- A3 - 297mm × 420mm (Posters, diagrams)
- A5 - 148mm × 210mm (Notebooks, flyers)
- Ratio - √2:1 (1.414:1) for all A-series