WordPress Set Image Upload Size

There are four sizes of images that get created in wordpress when an admin user uploads an image to the media section. You can add more though. To do so, just add the following to the functions.php file:

add_image_size('custom_size_name',600,600);



In the above, the first number represents the maximum width, and the second is the maximum height. Basically the newly created image will fit within a box of those dimensions.