I have this setting in function.php

add_image_size( 'thumbnail-gallery', 185, 185, true );

It will display a square picture.

Everything is fine before I regenerate new size using "Regenerate Thumbnails" plugin.

After the process finished, the <?php the_post_thumbnail( 'thumbnail-gallery' ); ?> will return the original "big" url instead the regenerate url.

it does not crop. original file url. not square.

2 Answers 2


Look at the wp-content/uploads/ directory. Does your cropped image exists there? (e.g. myimage-185x185.jpg). If not, you could try to call add_image_size() on the init action hook.


function wpse27579_addImageSizes() {
    add_image_size('thumbnail-gallery', 185, 185, true);
add_action('init', 'wpse27579_addImageSizes');
  • yes. the generated images are there in wp-content. but WordPress just scale the image using css.
    – neotorama
    Commented Sep 3, 2011 at 1:54

This work beautifly for me:

add_theme_support( 'post-thumbnails' );

set_post_thumbnail_size( 200, 300 );

add_image_size( 'thumbnailGallerySmall', 145, 120 );

The Integration Code

<?php the_post_thumbnail('thumbnailGallerySmall');?>

Try it.. and good luck

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