eBay requires that images gave at least one dimension of 500 or more pixels. The Image Size Filter allows you to select products to list on the Products Tab based on whether or not the images are large enough for eBay.

 

 

The difference between the Ignore and Both options is that Ignore does not determine the size of images and, therefore, executes quicker while Both determines the size of images and displays a photo icon by the name of products with images that are okay for eBay and a warning icon for products with images that are not okay.