Hi Everyone, John Wright wrote about the rules for the size of a mouse. We have been scrutineering the rule for some time as follows. Cut a 25 cm square in a piece of cardboard. Can the scrutineer drop the square over the mouse? This allows a mouse to be up to 35cm wide if everything else fits. (It passes Michael Schumouser) It is very easy to implement and scrutineering takes a few seconds. Regards, Duncan