Sean Davis

It looks as if the theme specifically calls for gravatar.

Do you get the same behavior if you paste the following code into your child theme functions.php file? (do so carefully, and preferably through FTP and not the WordPress dashboard)

function evolve_comment_avatar( $avatar = true, $gravatar_size = 45 ) {
	global $comment;
	$author = get_comment_author();

	if ( $avatar ) {
		// Get author's gavatar
		$gravatar_email = get_comment_author_email();
		$gravatar_size = apply_filters( 'evolve_gravatar_size', (int) $gravatar_size ); // Available filter: evolve_gravatar_size
		$gravatar = get_avatar( $comment, $gravatar_size );

		// get the $src data from $gavatar
		if ( preg_match( '/src=\'(.*?)\'/i', $gravatar, $matches ) )
			$src = $matches[1];

		// Rebuild Gravatar link because get_avatar() produces invalid code :/ (P.S. adds "gravatar" class)
		$output = "<img class=\"avatar gravatar gravatar-{$gravatar_size}\" alt=\"{$author}'s Gravatar\" src=\"{$src}\" width=\"{$gravatar_size}\" height=\"{$gravatar_size}\" />";

		if (get_option('show_avatars')){  // Avatars enabled?
			return apply_filters( 'evolve_comment_avatar', (string) $output ); // Available filter: evolve_comment_avatar
		}
	}
}

That slightly modifies the method for retrieving the image. Let me know.

Hi, juanyo. As I believe you already noticed, the header is designed to fit the image into a maximum height of 150px. You absolutely can adjust the height to fit in a bigger image but it will require more than just one CSS adjustment. You’ll want to do this in either your child theme style.css file or perhaps a custom CSS plugin.

Increase the height of the area holding the image:

.top {
  height: 180px;
}

Increase the height of the header to handle the above adjustment.

.header-wrap {
  height: 250px;
}

You’d adjust the pixel count as needed.

Not without actually touching it. There is no hover state for touch devices.