Nick Smith wrote:

1. There should be no width or length constraints. Why exclude people who cannot (or don't want) to build small mice?

Duncan Louttit wrote

 After the conference, I understand Nick's problem. I believe his mouse meets the current specification anyway, but to clarify it I propose:-

"Mice must fit in a box 25 centimetres square. This implies a maximum dimension of 35 centimetres. There is no height or weight limit."

There must be some kind of limit on the size of mice from a safety viewpoint. It probably ought to be a weight limit, but it is easier for schools to measure lengths. Nicks point that bigger/heavier mice are handicapped by their weight is valid up to a point, but imagine someone having a software fault on a mouse the size and weight of a robot wars machine!

I expect this topic will need to be finally resolved for a future year.