Comment 6 for bug 1025706

In fact, currently you can adjust the icon size of all applets but the height can't be higher than the height of the icons' dock.

If you want to have an icon with an higher height, the dock's window has to be increased too (in order to have enough place to display the labels) but labels have to be moved to not be over the icon. It's mainly because there are other consequences which made the code more complex (and can cause more bugs) just for this feature and I guess this is why fabounet has removed this feature (but it's maybe better to wait for his answer ;) ).
Note that you can also place this clock applet in a desklet mode with the size that you want to have ;)