This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Custom Image Sizes


Custom Image Sizes is a WordPress plugin that

  • generates the correctly-sized version of an image’s thumbnail, if it doesn’t already exist.
  • lets you specify custom sizes with a size parameter of '[width]x[height]'.

Read more at the Custom Image Sizes page.


The typical WordPress way

  • Put add_image_size( 'my_custom_thumbnail_name', 220, 130, true ); in your theme’s functions.php file.
  • Add the code to display that attachment’s thumbnail where you want it to appear: echo wp_get_attachment_image($attachment_id, 'my_custom_thumbnail_name');
  • Unlike WordPress by itself, Custom Image Sizes will generate the thumbnail for an image, even if the image was uploaded before this add_image_size() was set.

A more direct Custom Image Sizes way

  • Call wp_get_attachment_image_src() or wp_get_attachment_image() with the desired thumbnail '[width]x[height]' dimensions, like so:

      echo wp_get_attachment_image($attachment_id, '220x80');
       * The above prints markup like
       * <img width="220" height="80" title="" alt=""
       *    class="attachment-220x80" src="" />


  1. Upload filosofo-custom-image-sizes/ to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress

Contributors & Developers

“Custom Image Sizes” is open source software. The following people have contributed to this plugin.