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Paper Size Chart: ISO A, B, C Series, Press Sheets and US Sizes

Print jobs mix ISO and US paper sizes every day, especially in export packaging inserts, manuals and labels. This chart lists trimmed sizes in millimetres and inches, plus RA and SRA press sheets used for bleed.

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SizeStandardMillimetres (W x H)Inches (W x H)Common use
A0
ISO 216
841 x 1189
33.11 x 46.81
Technical drawings, posters
A1
ISO 216
594 x 841
23.39 x 33.11
Posters, flip charts
A2
ISO 216
420 x 594
16.54 x 23.39
Posters, drawings
A3
ISO 216
297 x 420
11.69 x 16.54
Drawings, large flyers
A4
ISO 216
210 x 297
8.27 x 11.69
Letters, documents, brochures
A5
ISO 216
148 x 210
5.83 x 8.27
Booklets, notepads
A6
ISO 216
105 x 148
4.13 x 5.83
Postcards, small leaflets
A7
ISO 216
74 x 105
2.91 x 4.13
Small cards, labels
B0
ISO 216
1000 x 1414
39.37 x 55.67
Large posters
B1
ISO 216
707 x 1000
27.83 x 39.37
Posters
B2
ISO 216
500 x 707
19.69 x 27.83
Posters, wall charts
B3
ISO 216
353 x 500
13.90 x 19.69
Posters
B4
ISO 216
250 x 353
9.84 x 13.90
Large envelopes, folders
B5
ISO 216
176 x 250
6.93 x 9.84
Books, notebooks
B6
ISO 216
125 x 176
4.92 x 6.93
Books, small notebooks
C4 envelope
ISO 269
229 x 324
9.02 x 12.76
Holds A4 flat
C5 envelope
ISO 269
162 x 229
6.38 x 9.02
Holds A5 flat or A4 folded twice
C6 envelope
ISO 269
114 x 162
4.49 x 6.38
Holds A6 flat
DL envelope
ISO 269
110 x 220
4.33 x 8.66
Holds A4 folded in thirds
RA3
ISO 217
305 x 430
12.01 x 16.93
Raw sheet, trims to A3
RA4
ISO 217
215 x 305
8.46 x 12.01
Raw sheet, trims to A4
SRA3
ISO 217
320 x 450
12.60 x 17.72
Digital press sheet with bleed for A3
SRA4
ISO 217
225 x 320
8.86 x 12.60
Press sheet with bleed for A4
Letter
US
215.9 x 279.4
8.5 x 11
Standard US office paper
Legal
US
215.9 x 355.6
8.5 x 14
Legal documents
Tabloid / Ledger
US
279.4 x 431.8
11 x 17
Drawings, newsletters
Executive
US
184.2 x 266.7
7.25 x 10.5
Stationery
Statement / Half Letter
US
139.7 x 215.9
5.5 x 8.5
Small forms, booklets

Trimmed sizes. Inch values for ISO sizes are rounded to two decimals. Press sheet sizes (RA, SRA) are larger than the finished size to allow for trim, bleed and gripper margin.

Print spec data in your ERP

Optional review of how size, sheet and unit data are stored for print jobs.

Optional. The tool and every export work without this. No spam.

How to use the chart

Search by the size name or by dimensions. For a quote, find the finished size, then the press sheet that gives bleed and gripper margin, for example A3 jobs usually print on SRA3 digital sheets. Export the table to Excel to share with customers who work in the other unit system or to attach to a print specification.

  • A series: each size is half the one before
  • B series sits between A sizes
  • C series is for envelopes
  • RA and SRA are untrimmed press sheets

How ISO sizes work

ISO 216 A sizes keep an aspect ratio of 1 to the square root of 2, so cutting a sheet in half across its long side gives the next size down with the same proportions. A0 has an area of one square metre. That makes scaling artwork between sizes predictable and gives clean paper yield when a layout is imposed on a larger sheet.

Worked example

A leaflet of A5 finished size can be imposed 4-up on an SRA3 sheet only if bleed and gripper margin fit. SRA3 is 320 x 450 mm and four A5 trims need 296 x 420 mm, leaving 24 mm and 30 mm for marks, bleed and gripper. Use this check before quoting a digital run.

Common mistakes

Quoting US Letter and A4 as interchangeable on a tight imposition. Forgetting bleed, which needs the press sheet to be larger than the trim. Entering inches into a mm field in the estimating system. Store the unit of measure with every paper size in your ERP or print MIS.

Frequently Asked Questions

What is the difference between A4 and Letter?

A4 is 210 x 297 mm and US Letter is 215.9 x 279.4 mm. Letter is slightly wider and shorter. Documents designed for one may need rescaling or margin checks when printed on the other.

What size is SRA3?

SRA3 is 320 x 450 mm. It is slightly larger than A3 so that bleed, crop marks and gripper margins fit when printed on a digital or offset press and then trimmed to A3.

How do I convert mm to inches?

Divide millimetres by 25.4. For example 297 mm divided by 25.4 is 11.69 inches. Round to two decimals for estimating and keep millimetres as the master unit where possible.

What is the DL envelope used for?

DL is 110 x 220 mm and fits an A4 sheet folded in thirds. It is a common mailing envelope for invoices and statements in countries that use ISO sizes.

Netray can help you map print specifications to ERP item and routing data so size, sheet and imposition information is not retyped.

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