Avatars in comments stuck at 32x32

Its a 56x56 box by default, I can use a style to make the box as big as I want, but I can't find the code to grab the proper size of avatar

 

Of course I would figure it out 37 seconds after posting:

/wp-includes/comment-template.php :
... function wp_list_comments ...
$defaults = ... 'avatar_size' => 32,

Change 32 to whatever you want