diff --git a/private/lib/media/MediaRendererInterface.php b/private/lib/media/MediaRendererInterface.php
index 11d31ba..079c975 100644
--- a/private/lib/media/MediaRendererInterface.php
+++ b/private/lib/media/MediaRendererInterface.php
@@ -24,6 +24,9 @@ interface MediaRendererInterface{
 	const SIZE_MINI_H = 60;
 	
 	
+	const SIZE_FACEBOOK = 6;
+	const SIZE_FACEBOOK_W = 200;
+	const SIZE_FACEBOOK_H = 112;
 	
 	
 	public function asText(array $opt = array()) ;