Whenever I am spotted around the Ithaca area wearing what I refer to as barn boots (http://gprix.com/irbboot.gif) folks of the British persuasion refer to them as wellies (http://www.exarmy.co.uk/196thumb.jpg).

Rubbers are the loafers of slip-over boots. I couldn't find a good picture of rubbers as I know them, but, in case there's a separation by a common tongue issue here, here's one of loafers:

http://www.australiansheepskins.com/images/loafers.gif