A2 Card Size In Mm. Size size in mm size in cm size in inches; ±1.5 mm (0.06 in) for dimensions up to 150 mm (5.9 in) ±2 mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in) ±3 mm (0.12 in) for any dimension above 600 mm (23.6 in) a series paper sizes defined.
A6 card size is a sheet of a5 card folded in half. Cutting it in half will create two a3 sheets of paper. So to move up a size 210 x 2 = 420.
297 mm x 420 mm:
29.7 cm x 42 cm: Our selection of a2 card comes available. 105 mm x 148 mm: 841 mm x 1,189 mm (33.11 in.
