A4 210x297 mm Letterheads
A4 is the most popular format for letterheads. It is convenient to insert letterheads of this format into a file or a folder of standard sizes.
A5 148x210 mm Letterheads
A5 is a popular format for letterheads. A letterhead of this format is small, It is convenient to insert letterhead of such format in an envelope of standard sizes.
A6 105x148 mm Letterheads
A6 size is suitable for printing letterheads of a small size. Letterheads of this size are suitable for a small amount of information.
A7 74x105 Letterheads
A7 size is for small letterheads. 1/8 of A4 sheet.