Hello! I am planning on doing some sort of canvas (or something along those lines) with our monogram in the center for people to sign around at the reception. I will be having just over 200 people there (many of which will sign their own names instead of as groups of people). My question is how big should the canvas be? Some people will just sign names, but I've seen others who write sentiments, which is totally ok, but I don't want the canvas to be too small! Help please!