Featured slider : Please use bigger then 750 x 425 px
Featured slider Full width : Please use bigger then 1200 x 550 px
Post Images : Please use bigger then 750 x 425 px
Author featured Image : Please use 160 x 160 px
Important Note : When you switch different themes ( Activate ) theme your image size may not be suitable for style blog if you are expecting a problem with image sizes make sure you regenerate thumbnails again with a plugin called “Force re-generate thumbnails”.