Hey @giacomosilli Where are you seeing the “Image size smaller than recommended size” error? What actual sizes of images are being served? Are you using Responsive Images by any chance? Would be cool if you could provide a clean reproducible example Cheers!
The structured data in the AMP refers to an image that is smaller than our recommended size. This may prevent the page from appearing with all AMP-related features on Google Search, and may also prevent your Discover cards from appearing with large images (leading to decreased website traffic and user engagement). To fix, use a larger image according to our guidelines.
new recommended size for all images is:
Images should be at least 1200 pixels wide.
Ghost does resize images, but only to size them down to default 2000px width (which should be ok by AMP standard). My guess is that the images you have been using could be of lower size. Could you please check on that and maybe provide one as a sample is it’s of good enough size :)