diff --git a/tsg_util/tsg_initialisation.m b/tsg_util/tsg_initialisation.m
index 765b22e572aabfdb31caf13d2873260e2fe1476d..12fdbfa0401f1a7975632dd57224c75de4799f5c 100644
--- a/tsg_util/tsg_initialisation.m
+++ b/tsg_util/tsg_initialisation.m
@@ -42,9 +42,15 @@ end
 set(0,'Units','pixels');
 screenSize = get(0,'ScreenSize');
 
+% get horizontal screen dimension in pixel
+% ----------------------------------------
+horizontal = screenSize(3);
+
 % set default font size
 % ---------------------
-if screenSize(3) <= 1024
+if horizontal < 1024
+  tsg.fontSize = 8;
+elseif horizontal <= 1280
   tsg.fontSize = 9;
 else
   tsg.fontSize = 11;