Control the Size of Featured Images with PublishPress Checklists
When you use the PublishPress Checklists plugin, you can define tasks that content creators must complete before their posts are published.
For example, you can make sure your posts have a minimum or maximum number of words. Or you can require that all the images in the post have ALT text.
One of the most popular options allows you to force all posts to have a featured image. PublishPress Checklists Pro now takes this one step further: you can require a specific height and width for all your featured images. This feature is useful because many themes only look good if your featured images are the correct size.