<?php wp_list_comments( array( ‘avatar_size’ => ’50’ ) ); ?>

<?phpadd_filter( 'avatar_defaults', 'new_default_avatar' );function new_default_avatar ( $avatar_defaults ) {		//Set the URL where the image file for your avatar is located		$new_avatar_url = get_bloginfo( 'template_directory' ) . '/images/new_default_avatar.png';		//Set the text that will appear to the right of your avatar in Settings>>Discussion		$avatar_defaults[$new_avatar_url] = 'Your New Default Avatar';		return $avatar_defaults;}?>


.comment-list .avatar { /*Insert Your Styling Here */}