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I've had the same WordPress blog for years upon years, and years ago, I installed the Simple Image Sizes plugin to control image sizes. I think I wanted an easy way to set the size of post header images.

I didn't document things well, though, so I added a bunch of image sizes and now, years and at least one theme change later, I don't have any idea where those image sizes I added are actually used in my site, if at all.

According to my Media page and the Simple Image Sizes plugin, in addition to thumbnail, medium, and large image sizes, I also have the following:

  • post-thumbnail
  • post-image
  • post-image-cover
  • image-thumb
  • blog-thumb

I'd like to remove the unused image size definitions if possible, since they're causing massive storage bloat with each uploaded image, but I don't know which of them are unused.

More experienced WordPress admins: how would you go about locating where in plugin and theme files, if anywhere, those image sizes are used?

Thanks.

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I would use my text editor to do a find in folder for each image size, starting with post-thumbnail. If non are found, then they aren't being used.

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Now that you've changed the theme, you should stick to using theme's image sizes & remove the "Simple Image Sizes" plugin. This will ensure images are shown perfectly.

If you still intend to remove some of the sizes, in your theme's functions.php locate code similar to this.

`add_action( 'after_setup_theme', 'setup' ); function setup() { // ...

add_theme_support( 'post-thumbnails' ); // This feature enables post-thumbnail support for a theme
add_image_size( 'header', 600, 200, true ); // header image
add_image_size( 'custom-size1', 400, 200 ); // 400 pixel wide and 200 pixel tall, resized proportionally
add_image_size( 'custom-size2', 400, 200, true );// 400 pixel wide and 200 pixel tall, cropped

// ...

}`

Or search for add_image_size or post-image-cover in your theme's folder to locate & remove.

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