I don't understand why this happens

I created a new image size in functions.php called blog. Code looks like this

    add_theme_support( 'post-thumbnails' );
add_image_size('blog', 134, 134, false); 

Yet for some reason when the featured image comes out as 134 by 58 when called like this

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

Can anyone tell me why that is? The actual image uploaded to the library is much larger than that

1 Answer 1


When you set that final argument of add_image_size() to false, it scales the image down until the height or width matches one of the set values, then it maintains the proportions.

For example:

  • A 600px by 400px image using your settings is 134px wide (the long dimension) and then 89px tall (proportional to 134px wide).
  • If the image were 400px by 600px it would be 134px tall by 89px wide.
  • Okay, that makes sense but why didn't it change when I changed it to true? The image is big enough
    – Jamie
    Commented Aug 30, 2012 at 4:21
  • If you change add_image_size() parameters after the fact, you often have to use a plugin like Regenerate Thumbnails to recrop all the photos.
    – mrwweb
    Commented Aug 30, 2012 at 14:05

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