Signatures can be a maximum of two lines (including blank lines) or three for Donating Members (when the screen size is 800 pixels wide).
Large and long signatures make posts and threads hard to read, which is what we want to avoid. We do not allow long signatures, signatures with huge icons, nor do we allow links to commercial sites (unless you are Donating Member). Links to non-Yorkie related commercial sites for Donating Members may be removed at our discretion.
Here are the rules to signatures:
http://www.yorkietalk.com/forums/showthread.php?t=27071