A phrase such as 'paper size 330x220' means very little to me. I do not think I am alone in this. I have got used to A4 ~ and C6 ~ and more recently I have got I have become acquainted with some larger sizes. I find that very often items on the WWW have no scale. I have tried to rectify this on any sites I produce (such as this). Here are a few pictures to help others who are in the same boat.