Featured image Size

Hello arnaudl,

As for the image sizes, there is no ideal image size I can recommend. You will have to assess the containers and thumbs you plan on using on your site and the post templates as well. if you use post templates that use the full-size images like: http://demo.tagdiv.com/newspaper/td-post-2015-awards-all-of-the-best-and-worst-moments-from-the-show/ then a full-width image is required. If not, you need to inspect every element, especially on the homepage. If you use big grids, your images must be at least the size of the big grid container otherwise, they will not fit inside and not display properly. Here is a list of all thumbs used in our theme:
https://forum.tagdiv.com/theme-thumbs/ also -> https://forum.tagdiv.com/thumbnails-vs-featured-image-size/

Hope this helps!

Thanks for your understanding!