Paper Sizes Explained

This list of the common American and European paper sizes includes the ISO standards, which are used globally. All dimensions are specified in inches, millimeters as well as PostScript points (1/72 inch, always rounded off). The overview covers:

  • ISO page sizes – The ISO A series is the most frequently used page measurement standard. It includes the DIN A4 format. The ISO B sizes are used for poster printing while ISO C is meant for envelopes. The SRA standard defines press sheet sizes and is used in the printing industry.
  • American paper size dimensions – such as ‘Letter’, ‘Legal’ and the ANSI series.
  • English sheet sizes – with a focus on formats for writing paper and book printing.
  • Newspaper sizes

ISO A paper sizes

The A-series consists of a logical set of paper sizes that are defined by the ISO 216 standard. The largest size (A0) measures one square meter. The height/width ratio remains constant (1:1.41) for all sizes. This means you get the A1 size by folding an A0 paper in two along its shortest side. Then fold the A1 size in two to get an A2 size paper, and so on… A-sizes are used to define the finished paper size in commercial printing: A4 is for office documents, A5 is for notepads and A6 is for postcards.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
A0
841
1189
33.11
46.81
2384
3370
A1
594
841
23.39
33.11
1684
2384
A2
420
594
16.54
23.39
1190
1684
A3
297
420
11.69
16.54
842
1190
A4
210
297
8.27
11.69
595
842
A5
148
210
5.83
8.27
420
595
A6
105
148
4.13
5.83
298
420
A7
74
105
2.91
4.13
210
298
A8
52
74
2.05
2.91
148
210


This drawing illustrates the principle behind the ISO A series:
A0, A1, A2, A3, A4, A5, A6, A7 and A8

ISO B paper sizes

The same logic from the A-sizes also applies for the B-series, except here the starting point was the dimension of one of the sides, which starts at 1 meter. B-sizes are often used for posters.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
B0
1000
1414
39.37
55.67
2835
4008
B1
707
1000
27.83
39.37
2004
2835
B2
500
707
19.69
27.83
1417
2004
B3
353
500
13.90
19.69
1001
1417
B4
250
353
9.84
13.90
709
1001
B5
176
250
6.93
9.84
499
709
B6
125
176
4.92
6.93
354
499
B7
88
125
3.46
4.92
249
354
B8
62
88
2.44
3.46
176
249
B9
44
62
1.73
2.44
125
176
B10
31
44
1.22
1.73
88
125


ISO C paper sizes

C-sizes are used for envelopes to match the A-series paper. I have omitted unrealistic sizes like C0 (imagine an envelope measuring 917 by 1297 millimeters).

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
C2
648
458
25.51
18.03
1837
578
C3
458
324
18.03
12.76
578
919
C4
324
229
12.76
9.02
919
649
C5
229
162
9.02
6.38
649
459
C6
162
114
6.38
4.49
459
323


ISO D paper sizes

ID-sizes are the envelope sizes for the B series.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
D0
1090
771
42.91
30.35
3090
2186


ISO RA & SRA paper sizes

These oversized papersizes are used by printers. The dimensions in millimetres are rounded to the nearest value.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
SRA0
1280
900
50.39
35.43
3628
2551
SRA1
900
640
35.43
25.20
2551
1814
SRA2
640
450
25.20
17.72
1814
1276
SRA3
450
320
17.72
12.60
1276
907
SRA4
320
225
12.60
8.86
907
638
RA0
1220
860
48.03
33.86
3458
2438
RA1
860
610
33.86
24.02
2438
1729
RA2
610
430
24.02
16.93
1729
1219


American paper sizes

The US and Canada do not use the international standards but instead rely on the paper sizes below. The ANSI standard was added in 1995 to create a set of sizes that are based on shared dimensions. It lacks however the consistent aspect ratio of the ISO A-series.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
Letter (ANSI A)
215.9
279.4
8.5
11
612
792
Legal
215.9
355.6
8.5
14
612
1008
Ledger (ANSI B)
279.4
431.8
11
17
792
1224
Tabloid (ANSI B)
431.8
279.4
17
11
1224
792
Executive
184.1
266.7
7.25
10.55
522
756
ANSI C
559
432
22
17
1584
1224
ANSI D
864
559
34
22
2448
1584
ANSI E
1118
864
44
34
3168
2448


English paper sizes (writing papers)

The English nowadays use the A-sizes for office and general use. I have no idea whether many of these definitions are still in use today. Imperial and half-imperial still seem to be widely used by artists.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
Foolscap
336
419
13.25
16.5
954
1188
Small Post
368
469
14.5
18.5
1044
1332
Sheet and 1/3 cap
336
588
13.25
22
954
1584
Sheet and 1/2 cap
336
628
13.25
24.75
954
1782
Demy
394
507
15.5
20
1116
1440
Large Post
419
533
16.5
21
1188
1512
Small medium
444
558
17.5
22
1260
1584
Medium
457
584
18
23
1296
1656
Small Royal
482
609
19
24
1368
1728
Royal
507
634
20
25
1440
1800
Imperial
559
761
22
30
1584
2160


UK metric book printing sizes

For books A-sizes often aren’t used because A4 is too large and A5 too small. Metric Royal Octavo and Metric Crown Quarto are 2 frequently used sizes that are more comfortable to hold and read.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
Metric Crown Quarto
189
246
7 7/16
9 11/16
536
697
Metric Crown Octavo
123
186
4 13/16
7 5/16
349
527
Metric Large Crown Quarto
201
258
7 7/8
10 3/16
570
731
Metric Large Crown Octavo
129
198
5 1/16
7 13/16
366
561
Metric Demy Quarto
219
276
8 5/8
10 7/8
621
782
Metric Demy Octavo
138
216
5 7/16
8 1/2
391
612
Metric Royal Quarto
237
312
9 5/16
12 1/4
672
884
Metric Royal Octavo
129
198
5 1/16
7 13/16
366
561


Newspaper sizes

The dimensions of newspaper pages are not that strictly defined, so the average or most frequently used size is mentioned.

Millimeters
Inches
Points
Width
Height
Width
Height
Width
Height
Berliner or Midi
± 315
± 470
± 12.4
± 18.5
± 893
± 1332
Broadsheet
± 597
± 749
± 23.5
± 29.5
± 1692
± 2124
Compact or Tabloid
± 280
± 430
± 11
± 16.9
± 792
± 1217
Rhenish
± 355
± 520
 ± 13.97  ± 20.47
± 1006
± 1474