Amazfit Watch faces

Are there any requirements for the images other than the .png file type?
I made a watchface and I managed to pack it with the Amazfit watchfaces Tool but when I try to sync it an error pops up
on the watch saying it can't download the dial.

Back to answer my own question in case anyone else has this problem. It's the size, if you pack your skin and the .bin file is over 2MB it won't sync.