B Format Paper Size Dimensions

Folio 304.8 × 482.6 mm Quarto 241.3 × 304.8 mm Imperial Octavo 209.55 × 292.1 mm Super Octavo 177.8 × 279.4 mm Royal Octavo 165.1 × 254 mm Medium Octavo 165.1 × 234.95 mm Octavo 152.4 × 228.6 mm Crown Octavo 136.525 × 203.2 mm 12mo 127 × 187.325 mm 16mo 101.6 × 171.45 mm 18mo 101.6 × 165.1 mm 32mo 88.9 × 139.7 mm 48mo 63.5 × 101.6 mm 64mo 50.8 × 76.2 mm A Format 110 × 178 mm B Format 129 × 198 mm C Format 135 × 216 mm