A new dog quilt

I have got a few WIPs I need to finish, a bee block to put borders on, a block to make for Fat Quarterly and a pattern I want to make into a top so I can sell my pattern.HOWEVER (cue crappy iPhone picture featuring chewed pen)...I have decided to map out my next dog quilt instead. It's of Giant George, or Really-Big George as we like to call him. I just need to blow this up to span several sheets of A3 and get mapping... How big do you reckon I should go?Right it's bingo night and I'm hungry! Bye for now!