diff --git a/addons/web_editor/static/src/js/editor/snippets.options.js b/addons/web_editor/static/src/js/editor/snippets.options.js
index 1825fe411e5..60d89f17618 100644
--- a/addons/web_editor/static/src/js/editor/snippets.options.js
+++ b/addons/web_editor/static/src/js/editor/snippets.options.js
@@ -7314,7 +7314,7 @@ registry.BackgroundPosition = SnippetOptionWidget.extend({
     backgroundType: function (previewMode, widgetValue, params) {
         this.$target.toggleClass('o_bg_img_opt_repeat', widgetValue === 'repeat-pattern');
         this.$target.css('background-position', '');
-        this.$target.css('background-size', '');
+        this.$target.css('background-size', widgetValue !== 'repeat-pattern' ? '' : '100px');
     },
     /**
      * Saves current background position and enables overlay.