A4 size in pixels. Convenient calculator with different DPIs.
The Ideal Resolution for Metal Prints - ShinyPrints
Resolution, Resizing, and Dots per Inch - Pathfinder
Printing your artwork: Image size and resolution - Corel Discovery Center
Absolute Printing Rule: Always check the dpi --The Pixels per inch (ppi) setting for the photograph before you print
Using Test Charts | Imatest
Is the resolution of your image high enough to print?
DPI vs PPI: What's the Difference? - Photography Course
Blog - Bene
How Image Resolution Affects Print Quality - Photoshop Tutorial
What Does DPI Mean? - Handy Indie Author Guides by Old Mate Media
Duggal Visual Solutions :: Quick Guide to DPI Printing
DPI vs PPI, Understanding DPI For Print | Graphicolor Printing
ppi resolution - pixels to inches | Star Print Brokers
Best DPI for Printing Photos & Standard Photo Sizes (Guide)
Pixels Per Inch Image Resolution Calculator | IndigoImageLab.com
The ultimate guide to image resolution | Creative Bloq
DPI for Printing on Metal and Acrylic | What is DPI
Pixels To Cm For Printing
PPI vs. DPI: what's the difference?
PPI vs. DPI: Demystifying the World of Online and Print Resolution
