Created attachment 9161 The plugin starts from the mouse pointer! The timer line is surrounding really wide "separator" like lines on both sides. Check the screenshot! This way the plugin takes up about 10 times more space on the screen than needed. Please take into consideration to show this plugin the same way as the System Load Monitor appears. You can see it on the screenshot as well.
Andre Miranda referenced this bugreport in commit b6741af725d6ae1247bbde49d624c6a5159d159e Avoid square-sized plugin (Bug #16101) https://git.xfce.org/panel-plugins/xfce4-timer-plugin/commit?id=b6741af725d6ae1247bbde49d624c6a5159d159e