Full Error Message:
Images too small
eBay reports that the image(s) for this product don’t meet the minimum image size requirements.
ChannelUnity can automatically increase the size for you.
To do this, please edit your listing settings, and enable the optional field -> Listing -> Automatically enlarge images.
Error: Buyers love large pictures that clearly show the item, so please upload high-resolution pictures that are at least 500 pixels on the longest side.
Image resolution is too low and does not meet eBay’s minimum requirement.
Increase the image resolution in your online store for the product