We recommend you to upload a RBG, 1024px square jpeg / png.
(The label image will be cut to a circle with 1024px diameter)
The image will be resized to 1024px when you upload a smaller or bigger image. If you upload a non square (rectangular) image, the longer side will be modified to 1024px, and the entire image will be cropped in to square based on the length of the shorter side. The cropped square will be than resized to 1024px.
Please note this is different from the pressing files that we use for printing the actual labels and sleeves.