diff --git a/src/Umbraco.Web.UI.Client/src/less/canvas-designer.less b/src/Umbraco.Web.UI.Client/src/less/canvas-designer.less
index 7410c09580..78c1616bc6 100644
--- a/src/Umbraco.Web.UI.Client/src/less/canvas-designer.less
+++ b/src/Umbraco.Web.UI.Client/src/less/canvas-designer.less
@@ -790,13 +790,13 @@ h4.panel-title {
 }
 
 .smartphone-portrait {
-    width: 320px;
-    height: 504px;
+    width: 360px;
+    height: 640px;
 }
 
 .smartphone-landscape {
-    width: 480px;
-    height: 256px;
+    width: 640px;
+    height: 360px;
 }
 
 .border {