Question

difference between A3 sheet and B4 sheet plz tell me it is too urgent

Answer 1

The B paper sizes are a bit larger than their A series counterparts and are based on the geometric mean of two consecutive A series sheets. Forexample, B4 is between A3 and A4 in size, and B5 is between A4 and A5. The C series was introduced to provide an envelope with enough space for an A series sheet.