If you don’t want full sizer images then just deactivate the custom plugin shared in the following topic
https://colorlibsupport.com/t/feature-image-size-looks-wrong/#post-103745
Then regenerate thumbnails on your site using following plugin.
If you don’t want full sizer images then just deactivate the custom plugin shared in the following topic
https://colorlibsupport.com/t/feature-image-size-looks-wrong/#post-103745
Then regenerate thumbnails on your site using following plugin.