When to use Resize Image in Inches
Resize a photo to a print size in inches, for example 2 × 2 inch or 4 × 6 inch. Pick the DPI and the exact pixel size is calculated automatically.
The best image settings depend on where the picture will be used. Pixel dimensions describe width and height; file size describes bytes. Changing one does not guarantee a particular value for the other. Keep the original, compare the result at its intended size, and choose a format accepted by the destination.