diff --git a/benchmarks/sizeof_gui/init b/benchmarks/sizeof_gui/init
new file mode 100644
index 000000000..0c01d9cc5
--- /dev/null
+++ b/benchmarks/sizeof_gui/init
@@ -0,0 +1,5 @@
+#ifndef _sizeof_gui_icpp_init_stub
+#define _sizeof_gui_icpp_init_stub
+#include "CtrlLib/init"
+#include "RichEdit/init"
+#endif
diff --git a/benchmarks/sizeof_gui/main.cpp b/benchmarks/sizeof_gui/main.cpp
new file mode 100644
index 000000000..333e341dc
--- /dev/null
+++ b/benchmarks/sizeof_gui/main.cpp
@@ -0,0 +1,26 @@
+#include <CtrlLib/CtrlLib.h>
+#include <RichEdit/RichEdit.h>
+
+using namespace Upp;
+
+GUI_APP_MAIN
+{
+	StdLogSetup(LOG_FILE|LOG_COUT);
+
+	RDUMP(sizeof(Image));
+	RDUMP(sizeof(RichText));
+	RDUMP(sizeof(Ctrl));
+	RDUMP(sizeof(Button));
+	RDUMP(sizeof(Switch));
+	RDUMP(sizeof(Label));
+	RDUMP(sizeof(EditField));
+	RDUMP(sizeof(EditString));
+	RDUMP(sizeof(EditIntSpin));
+	RDUMP(sizeof(ArrayCtrl));
+	RDUMP(sizeof(TreeCtrl));
+	RDUMP(sizeof(TreeCtrl::Node));
+	RDUMP(sizeof(FileSel));
+	RDUMP(sizeof(RichTextView));
+	RDUMP(sizeof(ColumnList));
+	RDUMP(sizeof(RichEdit));
+}
diff --git a/benchmarks/sizeof_gui/sizeof_gui.upp b/benchmarks/sizeof_gui/sizeof_gui.upp
new file mode 100644
index 000000000..8bda99db1
--- /dev/null
+++ b/benchmarks/sizeof_gui/sizeof_gui.upp
@@ -0,0 +1,10 @@
+uses
+	CtrlLib,
+	RichEdit;
+
+file
+	main.cpp;
+
+mainconfig
+	"" = "GUI SSE2";
+