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Disabling this WordPress feature which automatically generates various sizes of an uploaded image, is normally as simple as going to WordPress Dashboard > Settings > Media screen and changing all image-size options to 0 (zero).

Unless I am missing something, this is not the case with my blog. Any image I upload gets a 92 pixel square thumbnail cousin.

I have searched through all the theme files for any and all occurrences of the number '92', but there's none! So I am guessing it's WordPress core?

PS:

  • This WordPress Codex page says that the default sizes for thumbnail, medium, and large resolution images are 150 px, 300 px, and 640 px (squares) respectively. A 92 px square is clearly not among the defaults.

  • I read here that WordPress creates "one additional thumb for Dashboard interface needs". I am not sure where. Is this why the 92px thumb is being generated? (I don't think so.)

  • In case it helps, I am using a WordPress.com theme called "Reddle" on my self-hosted blog. It looks like the theme was developed by Automattic Theme Wranglers.

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Did you check the functions.php file? Check something like set_post_thumbnail_size function... anyway if you make changes, keep in mind that you need upload the image again, to generate the new thumbnail and note changes –  Tom Sarduy May 6 '12 at 10:11
    
@Tom I use a Gedit (text editor) plugin to search all my theme files -- absolutely no instances of 92, the number. I use this in my functions.php though add_image_size( 'featimage', 310, 150, true ); to define a custom image size. But it shouldn't be messing things up. –  its_me May 6 '12 at 10:16
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1 Answer

up vote 3 down vote accepted

Take a look at the output of get_intermediate_image_sizes(). If there are any image sizes listed other than 'thumbnail', 'medium' or 'large', a plugin or a theme has added a custom size.

From our chat discussion I know it was WPtouch Pro. :) But it could have been any plugin. There are also sometimes plugins in the directory mu-plugins.

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