File Format Requirements Accepted File Formats We accept the following file formats: AI, EPS, PDF (vector preferred), PNG, PSD . Minimum resolution for raster images: 300 DPI at print size. Color mode: CMYK for best color accuracy, though we can convert from RGB. Vector vs. Raster Vector files (AI, EPS, PDF) provide the best results as they can be scaled to any size without losing quality. Raster files (PNG, PSD) must be at least 300 DPI at the final print size.