diff --git a/includes/core/class-member-directory.php b/includes/core/class-member-directory.php
index e6b71e97..cdcae394 100644
--- a/includes/core/class-member-directory.php
+++ b/includes/core/class-member-directory.php
@@ -2265,7 +2265,8 @@ if ( ! class_exists( 'um\core\Member_Directory' ) ) {
 
 
 			$sizes = UM()->options()->get( 'cover_thumb_sizes' );
-			$this->cover_size = UM()->mobile()->isTablet() ? $sizes[1] : $sizes[0];
+
+			$this->cover_size = UM()->mobile()->isTablet() ? $sizes[1] : end( $sizes );
 
 			$avatar_size = UM()->options()->get( 'profile_photosize' );
 			$this->avatar_size = str_replace( 'px', '', $avatar_size );