diff --git a/src/widget/multilayersingletree/multilayersingletree.combo.js b/src/widget/multilayersingletree/multilayersingletree.combo.js
index 74876e8d5..4e26c1a0c 100644
--- a/src/widget/multilayersingletree/multilayersingletree.combo.js
+++ b/src/widget/multilayersingletree/multilayersingletree.combo.js
@@ -49,6 +49,8 @@ BI.MultiLayerSingleTreeCombo = BI.inherit(BI.Widget, {
         }
 
         return BI.extend(baseConfig, {
+            width: BI.toPix(o.width, 2),
+            height: BI.toPix(o.height, 2),
             el: {
                 type: "bi.single_tree_trigger",
                 ref: function (_ref) {