Your Guide to British Standard Formats Paper Sizes

'A' SERIES FOR TRIMMED WORK
Size (Millimetres) (Inches)
 
A0 841 x1189mm 33 1/8" x 46 3/4"
A1
594 x 841mm
23 3/8" x 33 1/8"
A2 420 x 594mm 16 1/2" x 23 3/8"
A3
297 x 420mm
11 3/4" x 16 1/2"
A4 210 x 297mm 8 1/4" x 11 3/4"
A5 148 x 210mm 5 7/8" x 8 1/4"
A6 105 x 148mm 4 1/8" x 5 7/8"
A7 74 x 105mm 2 7/8" x 4 1/8"
A8 52 x 74mm 2" x 2 7/8"
A9 37 x 52mm 1 1/2" x 2"
A10 26 x 37mm 1" x 1 1/2"

 

'B' SERIES FOR LARGER FORMATS
Size (Millimetres) (Inches)
 
B0 1000 x 1414mm 39.4" x 55.7"
B1
707 x 1000mm
27.8" x 39.4"
B2 500 x 707mm 19.7" x 27.8"
B3
353 x 500mm
13.9" x 19.7"
B4 250 x 353mm 9.8" x 13.9"
B5 176 x 250mm 6.9" x 9.8"

 

'RA' SERIES FOR NORMAL TRIMS
Size (Millimetres) (Inches)
 
RA0 860 x 1220mm 33.8" x 48"
RA1
610 x 860mm
24" x 33.8"
RA2 430 x 610mm 16.9" x 24"

 

'SRA' SERIES FOR BLED WORK
Size (Millimetres) (Inches)
 
SRA0 900 x 1280mm 35.4" x 50.3"
SRA1
640 x 900mm
25.1" x 35.4"
SRA2 450 x 640mm 17.7" x 25.1"

Metric Equivalent for Traditional Sizes

BOOK PAPERS
Size (Millimetres) (INCHES)
 
Quad Royal
960 x 1270mm
N/A
Quad Demy
890 x 1130mm
N/A
Quad Large Crown 876 x 1056mm N/A

 

BUSINESS PAPERS
Size (Millimetres) (INCHES)
 
Double Cap
430 x 685mm
N/A
Large Post
420 x 535mm
N/A

 

GENERAL PRINT
Size (Millimetres) (INCHES)
 
Double Medium
585 x 910mm
N/A
Double Crown
508 x 762mm
N/A

Other Commonly Used Sizes

 
Size (Millimetres) (INCHES)
 
6pp A4
340 x 640mm / 630 x 880mm
N/A
12pp A4
640 x 650mm / 650 x 920mm
N/A

Envelope Sizes

 
Size To Take: Uses:
 
C3
A3 297 x 420mm unfolded
Computer printouts, brochures, calendars, showcards
C4
A4 210 x 297mm unfolded
A3 297 x 420mm folded once
Brochures, booklets and general printed matter, A4 size flat
C5
A4 210 x 297mm folded once
A5 148 x 210mm unfolded
Small brochures and letterheads, A4 folded in half
C6
A4 210 x 297mm folded twice
A5 148 x 210 folded once
General correspondence, invoices, etc.
DL
A4 210 x 297mm folded twice
A5 148 x 210mm folded once
All general correspondence, invoices, etc.
B4 To take sizes larger than the more popular C4 size  
B5 To take sizes than the more popular C5 size