diff --git a/guide/english/css/background-size/index.md b/guide/english/css/background-size/index.md
index 415a8c48e8..ce776c2994 100644
--- a/guide/english/css/background-size/index.md
+++ b/guide/english/css/background-size/index.md
@@ -6,6 +6,7 @@ title: Background Size
 The background-size property specifies the size of the background images. You can set a length or a percentage, with the first value being the width and the second one being the height. You can also use one of the 5 keyword values:
 
 ```css
+/* Background size property values that can be used */
 .auto {background-size: auto;}
 .cover {background-size: cover;}
 .contain {background-size: contain;}