Podcast artwork (cover image)
The cover image is used as the main artwork of your podcast in podcast clients.
The cover image should be at least 1400x1400 pixels large but not larger than 3000x3000 pixels. 72 dpi, JPG (.jpg) or PNG (.png) format, and in the RGB colorspace.
It is recommended that the cover image should optimally not be larger than 512kB, and never larger than 1MB.