A resolution of at least 100 dpi is necessary for optimal print quality. The image can be .JPG, .JPEG or .PND format and must be at least 2331 x 2687 pixels. The configurator will advise you if your image does not have the required resolution. If your image is not the correct size for your chosen appliance, you can find free image resizing tools by typing "free image resizing tools" into your chosen search engine.