pocket size.

http://www.aldi.co.uk/special_buys/special_buys_pid_45647.html

Just reminded me, they also have a digital mat for drawing/graphics for about £25, that would make my gf very very happy. She's a bit of a frustrated genius, think I'll change my avatar, or my profile pic, to one of her drawings, just to show.
Good show Dave!

EDIT: voila!

I have one of the tablets from a few years ago and it is really good - not that I have anything to compare with however.