On the main Chrome Webstore Chrome extensions page (https://chrome.google.com/webstore/category/extensions) and when you search for an extension, there is a 220x140 image that appears next to each extension's listing.
I cannot determine where to upload/set that particular image size (its not an option under the screenshots or promo images when you edit your extension's listing on the Chrome Web Store Developer Dashboard).
Does anyone know how to set this particular image, as it's using my 128x128 icon image in place, which looks terrible and isn't what I want to show in that 220x140 space.