Paper size chart: every ISO size in one place

How the series fit together

All ISO series work the same way. Cut a sheet in half across its long side and you get the next size down in the same series. The series only differ in the size of the sheet they start from.

A series

Starts with A0 at exactly 1 m² (841 × 1189 mm). Used for letters, print, notebooks and drawings.

B series

B0 has a short side of exactly 1 m (1000 × 1414 mm). Each B size sits between two A sizes. Used for posters, books and padded envelopes.

C series

Sits between A and B of the same number, so an A sheet fits a C envelope, which in turn fits a B envelope.

D series

Part of the original German DIN 476 and no longer standardised. Slightly smaller than the A series.

In maths terms, B4 is the geometric mean of A3 and A4, and C4 the geometric mean of A4 and B4. That sounds dry, but it has a handy result: A4 slips into C4 with a little room to spare, and C4 slips into B4. The full maths is on the aspect ratio page.

A series

4A0 and 2A0 are oversize formats for very large plans and posters. In everyday use the series starts at A0. Uses and details: A series in detail.

B series

You meet B sizes on posters, padded envelopes and many books. Watch out with Japanese printers and copiers: there, B5 often means the slightly larger JIS B5 at 182 × 257 mm. More on the B series and international sizes pages.

C series

The C series used to be an international standard as ISO 269, which was withdrawn in 2009 without a replacement. Germany still defines it in DIN 476-2. Envelope specials such as DL (110 × 220 mm) and C6/5 (114 × 229 mm) are covered by DIN 678. See C series and envelope sizes.

D series: the forgotten one

The D series appeared in the original German DIN 476 of 1922 and is no longer standardised. Its sizes sit slightly below the A series, starting with D0 at 771 × 1091 mm. You will hardly meet it today. One happy coincidence: a DVD case is about 135 × 190 mm, very close to D5 at 136 × 192 mm. Every size, how they are calculated and how not to confuse them with the Swedish D series is on the D series page.

Raw sizes, US sizes and more

Printers rarely print straight onto A4. They use larger raw sheets from the RA and SRA series in ISO 217, such as SRA3 at 320 × 450 mm, and trim afterwards. North America has its own sizes such as Letter (8.5 × 11 in), Legal and Tabloid, and Japan its own B series.

• RA and SRA sizesRA0 to RA4 and SRA0 to SRA4 under ISO 217 in mm and inches. Why printers run SRA3 and how many A4 pages fit on one sheet.
• US paper sizesLetter, Legal, Tabloid, Executive, ANSI A to E and Arch sizes in inches and millimetres, with the closest ISO sizes for each.
• Letter vs A4US Letter is wider and shorter than A4. The exact difference, what happens when you print one on the other and how to set up documents for both.
• International sizesJapanese JIS B sizes, Canadian P sizes and other national formats compared with ISO 216, with every dimension in mm and inches.
• DL sizeA DL envelope is 110 × 220 mm and a DL flyer 99 × 210 mm. How an A4 sheet folds in, window position and print sizes with bleed.

Download the full chart

The table of every size on this page is available as CSV for Excel and Google Sheets and as JSON for developers. The data is licensed CC BY 4.0: use it freely and credit DIN-Formate.info as the source.

Download CSVDownload JSON

All paper size pages

• A seriesEvery A size from 4A0 to A10 in mm, cm and inches. Why A0 is one square metre and how each size is exactly half of the one before.
• A0A0 paper is 841 × 1189 mm (33.1 × 46.8 in) and exactly one square metre. Pixel sizes for print, typical uses and how it relates to A1.
• A1A1 paper measures 594 × 841 mm (23.4 × 33.1 in). Pixel sizes for poster printing, frames and where A1 is used.
• A2A2 paper is 420 × 594 mm (16.5 × 23.4 in). Conversions, pixel sizes at 150 and 300 dpi and the jobs A2 is used for.
• A3A3 paper is 297 × 420 mm (11.7 × 16.5 in), twice the size of A4. Conversions, print pixels, copier zoom and A3 vs Tabloid.
• A4A4 paper is 210 × 297 mm or 8.27 × 11.69 inches. Pixels at 72 to 600 dpi, sheet weight, matching envelopes and how A4 differs from US Letter.
• A5A5 paper is 148 × 210 mm (5.83 × 8.27 in), half of A4. Pixel sizes for flyers and notebooks, the C5 envelope and print tips.
• A6A6 paper is 105 × 148 mm (4.13 × 5.83 in), the classic postcard size. Conversions, pixels, the C6 envelope and typical uses.
• A7A7 paper is 74 × 105 mm (2.91 × 4.13 in). Conversions, pixel sizes, typical uses and the small sizes A8, A9 and A10.
• B seriesAll ISO B sizes from B0 to B10 in mm and inches, what B4, B5 and B6 are used for, and why Japanese B sizes are different.
• B4B4 paper is 250 × 353 mm (9.84 × 13.9 in). Conversions, pixels, B4 envelopes for thick A4 documents and why B4 is the largest letter size.
• B5B5 paper is 176 × 250 mm (6.93 × 9.84 in), between A5 and A4. Conversions, pixels, copier settings, JIS B5 and what B5 is used for.
• C seriesAll C sizes from C0 to C10 in mm and inches. Why A4 fits a C4 envelope, how the series is calculated and which standard covers it today.
• D seriesThe German D series was part of the first DIN 476 and is no longer standardised. All sizes from D0 to D10 in mm, cm and inches and how they are calculated.

Frequently asked questions