B0: 1,028 mm x 1,456 mm (40.48 in. x 57.32 in.) B1: 707 mm x 1,000 mm (28.66 in. x 40.48 in.) B2: 514 mm x 728 mm (20.24 in. x 28.66 in.) B3: 364 mm x 514 mm (14.33 in. x 20.24 in.) B4: 257 mm x 364 mm (10.12 in. x 14.33 in.) B5: 182 mm x 257 mm (7.17 in. x 10.12 in.) B6: 128 mm x 182 mm (5.04 in. x 7.17 in.)
