If you don't know your specs, you can't start your project. PicMonkey's here to help. Read this guide for all things sizing, dimensions, and conversions!
Inches to pixels converter/calculator - Tools to help
How to adjust the DPI setting without adjusting the pixel size of
Inches to Pixels Converter (With Customizable PPI / DPI)
Pixels to Inches Converter
Inches to Pixels Converter (With Customizable PPI / DPI)
How To Check Your Image Resolution
Pixels to inches conversion
Convert Inches to Pixels & Pixels to Inches - InchesToPixels
Pixels, images, and files
The 72 PPI Web And Screen Resolution Myth
Convert Inches to Pixels - Online in to px conversion
Photograph Field of View and Pixel Size Calculator – PhotoModeler