Resolution: the number of pixels (dots) that fit into one inch. If your file is low-resolution, this means that there are fewer pixels per inch, resulting in a blurry image. If your file is high-resolution, this means that the pixels are denser, resulting in a sharper, more detailed image.
DPI (dots per inch): the unit of measurement for resolution.
All files must be at least 300 DPI for paper prints and 150 DPI for everything else.
See how DPI looks up close and get more information at our Help Center.
The actual size: the size at which a design can be printed. Your file size and the actual print file size might differ. You can resize your original file if the resolution allows it, but it can’t exceed the print area of each product.
Discover more at our Help Center.