Our preferred file is a pdf or jpeg image and no larger than 50 MB. Contact us with any special requests at fmprintservice@gmail.com . An ideal file resolution for digital printing is 300 dpi (dots per inch), but we can also work with 150 dpi. Please take a moment to think about how file resolution will impact the size of your image. Be certain to select the correct resolution at the point of upload, or your image may print at an unexpected scale!