Imperial paper sizes

Information

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 × 635mm, and when it is folded three times, it makes 8 sheets and goes by the name ‘Royal Octavo’ which is 253 mm × 158 mm. This is a name given to modern hardbound books.

Format	Width x Height (cm)	Width x Height (inches)
Imperial	559 x 762	22 x 30
Royal	508 x 635	20 x 25
Demy	445 x 572	17.5 x 22.5
Crown	381 x 508	15 x 20
Foolscap	343 x 432	13.5 x 17
Quarto	229 x 279	9 x 11
Broadsheet	457 x 610	18 x 24
Post	394 x 489	15.5 x 19.3
Large Post	394 x 508	15.5 x 20
Double Post	483 x 762	19 x 30
Double Demy	572 x 902	22.5 x 35.5
Elephant	584 x 711	23 x 28
Double Elephant	678 x 1016	26.7 x 40
Atlas	660 x 864	26 x 34
Emperor	1219 x 1829	48 x 72
Princess	546 x 711	21.5 x 28
Cartridge	533 x 660	21 x 26
Copy Draught	406 x 508	16 x 20
Brief	343 x 406	13.5 x 16
Pott	318 x 381	12.5 x 15
Sheet, Half Post	495 x 597	19.5 x 23.5
Small Foolscap	337 x 419	13.3 x 16.5
Pinched Post	375 x 470	14.8 x 18.5
Monarch	184 x 267	7.2 x 10.5
Columbier	597 x 876	23.5 x 34.5
Grand Eagle	730 x 1067	28.7 x 42
Double Large Post	533 x 838	21 x 33
Quad Demy	889 x 1143	35 x 45
Antiquarian	787 x 1346	31 x 53
Super Royal	483 x 686	19 x 27
Medium	470 x 584	18.5 x 23