All of our premium themes will create copies of each image you upload to your media library. This helps ensure faster page load speed allowing for a better user experience. If you are switching to one of our themes from another themes we advise you regenerate all of the images on your site. This will ensure that the correct image sizes are available for use in the theme.

To regenerate all of your images automatically and in no time at all you can use the free Regenerate Thumbnails plugin which can be downloaded from WordPress.org

• WordPress.org – Regenerate Thumbnails Plugin Page