The follwing details are size guidelines.

BCARD:	55 x 85 mm
A7:	74 x 105 mm
A6:	105 x 148 mm
A5:	148 x 210 mm
A4:	210 x 297 mm
A3:	297 × 420 mm
A2:	420 × 594 mm
A1:	594 x 841 mm
A0:	841 x 1189 mm
DL:	210 x 99 mm