This is the first in our Printers Friend series of hints and tips to help our customers when deciding their needs for printing. Keeping to standard paper sizes, reduces wastage and keeps prices at a minimum. We'll always advise you on the best size of print for your needs, however our most common print sizes are A3 for Posters, A4 for Letterheads, A5 for Flyers and A6 for postcards. The diagram below shows how each paper size relates to the next. As you can see, each is proportionate to the next. A2 is twice the size of A3, which is double the size of A4 etc.