The 'A' Range is the finished trimmed size of paper used in printing and related industries.
The 'B' range covers a need for special applications, such as oversize documents and posters.
Here at Bishops Printers we also offer an additional size that we refer to as 'Bishops B5'. It is very popular when booklets and brochures need to stand out against other A and B sized publications. It also has the cost advantage of enabling you to fit more pages on a single sheet than B5.