WordPress – Disable image full size option

3 comments

1. Incase you don’t want hardcoded sizes, try this in your functions.php:

   add_filter('image_size_names_choose', function($sizes)
   {
       unset($sizes['full']);
       return $sizes;
   });
   

   References:

   • image_size_input_field()
   • media-template.php#L934

2. You should be able to filter out that option:

   function add_image_insert_override($size_names){
   
       //default array with hardcoded values for add_image_size
       $size_names = array(
                         'thumbnail' => __('Thumbnail'), 
                         'medium'    => __('Medium'), 
                         'large'     => __('Large'),
                         //'full'      => __('Full Size')
                       );
   
     return $size_names;
   
   };
   
   add_filter( 'image_size_names_choose', 'add_image_insert_override' );
   

   This gist goes into a little more detail.

3. Here is my solution.

   function sgr_filter_image_sizes( $sizes) {
   
       unset( $sizes['thumbnail']);
       unset( $sizes['medium']);
       unset( $sizes['large']);
   
       return $sizes;
   }
   add_filter('intermediate_image_sizes_advanced', 'sgr_filter_image_sizes');
   

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