diff --git a/samples/wrapsizer/wrapsizer.cpp b/samples/wrapsizer/wrapsizer.cpp
index 0dd8c8dbf4..db856dba78 100644
--- a/samples/wrapsizer/wrapsizer.cpp
+++ b/samples/wrapsizer/wrapsizer.cpp
@@ -131,8 +131,16 @@ WrapSizerFrame::WrapSizerFrame()
     sizerRoot->Add( new wxStaticText( m_panel, -1,
         "This is long text that will not wrap. This is long text that will not wrap."
     ));
+
+    // A window of 150px width for comparison.
+    auto* const ruler = new wxStaticText(m_panel, wxID_ANY, "150px",
+                                         wxDefaultPosition, wxSize(150, -1),
+                                         wxALIGN_CENTER);
+    ruler->SetBackgroundColour(*wxYELLOW);
+    sizerRoot->Add(ruler);
+
     // A long wxStaticText that wraps at 150px
-    wxStaticText *stattext = new wxStaticText( m_panel, -1, "This is very long text that will wrap at 150x. This is very long text that will wrap at 150px." );
+    wxStaticText *stattext = new wxStaticText( m_panel, -1, "This is very long text that will wrap at 150px. This is very long text that will wrap at 150px." );
     stattext->Wrap( 150 );
     sizerRoot->Add(  stattext );