Lists every registered image size — built-in and custom add_image_size() sizes — with width, height and crop mode in a Dashboard widget.

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Image Sizes in Admin Dashboard adds a read-only widget to the WordPress admin Dashboard that lists all currently registered image sizes.
Any size you register in your theme or plugin with <code>add_image_size()</code> is picked up automatically, alongside the built-in <code>thumbnail</code>, <code>medium</code>, <code>medium_large</code> and <code>large</code> sizes. Each row shows:
<ul>
<li>The image size name (human readable)</li>
<li>Width in pixels (— when unconstrained)</li>
<li>Height in pixels (— when unconstrained)</li>
<li>Crop mode (Cropped or Proportional)</li>
</ul>
This is handy when building a theme and you need a quick reference of the exact dimensions available to <code>the_post_thumbnail()</code> and the media library.
More detail on registering custom image sizes: https://developer.wordpress.org/reference/functions/add_image_size/

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