If a photo is definitely too small or too low-resolution to print, a warning icon appears over the photo once uploaded. We recommend swapping it out for a higher-res photo.
Generally, the best images for square prints, books, and classic prints are 2-5mb each. These are perfect for printing your Instagram and camera roll images!
The best images for engineer prints, fine art prints, and newsprints are 5-10mb each with a resolution of 300ppi/dpi.
Check out this article for specific tips on print sizes.
Feel free to contact us if you have questions about sizing. firstname.lastname@example.org