Imperial Paper Sizes

Imperial Size in cm, inches

Before the United Kingdom adopted the ISO 216 standard, British Imperial paper sizes were used. The Imperial paper sizes were used to define large sheets of paper, and the naming convention was derived from the sheet name, and how many times it was folded. For example 'Royal' paper is 508mm x 635mm, and when it is folded three times, it makes 8 sheets and goes by the name 'Royal Octavo' which is 253 mm x 158 mm. This is a name given to modern hardbound books.

Size Millimeters Inches
Antiquarian size 787 x 1346 mm 31 x 53 in
Atlas size 660 x 864 mm 26 x 34 in
Brief size 343 x 406 mm 13.5 x 16 in
Broadsheet size 457 x 610 mm 18 x 24 in
Cartridge size 533 x 660 mm 21 x 26 in
Columbier size 597 x 876 mm 23.5 x 34.5 in
Copy Draught size 406 x 508 mm 16 x 20 in
Crown size 381 x 508 mm 15 x 20 in
Demy size 445 x 572 mm 17.5 x 22.5 in
Double Demy size 572 x 902 mm 22.5 x 35.5 in
Quad Demy size 889 x 1143 mm 35 x 45 in
Elephant size 584 x 711 mm 23 x 28 in
Double Elephant size 678 x 1016 mm 26.7 x 40 in
Emperor size 1219 x 1829 mm 48 x 72 in
Foolscap size 343 x 432 mm 13.5 x 17 in
Small Foolscap size 337 x 419 mm 13.3 x 16.5 in
Grand Eagle size 730 x 1067 mm 28.7 x 42 in
Imperial size 559 x 762 mm 22 x 30 in
Medium size 470 x 584 mm 18.5 x 23 in
Monarch size 184 x 267 mm 7.2 x 10.5 in
Post size 394 x 489 mm 15.5 x 19.2 in
Sheet, Half Post size 495 x 597 mm 19.5 x 23.5 in
Pinched Post size 375 x 470 mm 14.8 x 18.5 in
Large Post size 394 x 508 mm 15.5 x 20 in
Double Large Post size 533 x 838 mm 21 x 33 in
Double Post size 483 x 762 mm 19 x 30 in
Pott size 318 x 381 mm 12.5 x 15 in
Princess size 546 x 711 mm 21.5 x 28 in
Quarto size 229 x 279 mm 9 x 11 in
Royal size 508 x 635 mm 20 x 25 in
Super Royal size 483 x 686 mm 19 x 27 in