1. Submit files in PNG or JPEG format with at least 300 DPI We recommend using PNG for designs with a transparent background. For other designs, we advise preparing files in JPEG instead. 2. Create files in sRGB color profile To ensure your design looks the same when printed as it does on screen, make sure you create your print file in sRGB color profile. 3. Trim artwork to pixel If your design has a specific height and therefore is smaller then the print area, please make sure that your artwork is trimmed to the pixel.