{
  "title": "Selected paper and envelope dimensions",
  "version": "1.0",
  "publisher": "The Guide Index",
  "canonicalURL": "https://theguideindex.com/reference/paper-sizes/",
  "scope": "23 selected nominal sizes; not a complete ISO/JIS standard, notebook catalog, printer or postal certification",
  "checkedAt": "2026-11-08",
  "inchConversion": "1 inch = 25.4 mm exactly; decimal inches are derived, rounded displays",
  "rights": "CC0 applies only to our normalized factual compilation; no rights in source text or standards are granted",
  "license": "https://creativecommons.org/publicdomain/zero/1.0/",
  "publicationStatus": "unpublished-review-draft",
  "sizes": [
    {
      "id": "iso-a0",
      "label": "A0",
      "family": "ISO A",
      "widthMm": 841,
      "heightMm": 1189,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A0: 841 x 1189 mm"
    },
    {
      "id": "iso-a1",
      "label": "A1",
      "family": "ISO A",
      "widthMm": 594,
      "heightMm": 841,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A1: 594 x 841 mm"
    },
    {
      "id": "iso-a2",
      "label": "A2",
      "family": "ISO A",
      "widthMm": 420,
      "heightMm": 594,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A2: 420 x 594 mm"
    },
    {
      "id": "iso-a3",
      "label": "A3",
      "family": "ISO A",
      "widthMm": 297,
      "heightMm": 420,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A3: 297 x 420 mm"
    },
    {
      "id": "iso-a4",
      "label": "A4",
      "family": "ISO A",
      "widthMm": 210,
      "heightMm": 297,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A4: 210 x 297 mm"
    },
    {
      "id": "iso-a5",
      "label": "A5",
      "family": "ISO A",
      "widthMm": 148,
      "heightMm": 210,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A5: 148 x 210 mm"
    },
    {
      "id": "iso-a6",
      "label": "A6",
      "family": "ISO A",
      "widthMm": 105,
      "heightMm": 148,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO A A6: 105 x 148 mm"
    },
    {
      "id": "iso-b0",
      "label": "B0",
      "family": "ISO B",
      "widthMm": 1000,
      "heightMm": 1414,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B0: 1000 x 1414 mm"
    },
    {
      "id": "iso-b1",
      "label": "B1",
      "family": "ISO B",
      "widthMm": 707,
      "heightMm": 1000,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B1: 707 x 1000 mm"
    },
    {
      "id": "iso-b2",
      "label": "B2",
      "family": "ISO B",
      "widthMm": 500,
      "heightMm": 707,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B2: 500 x 707 mm"
    },
    {
      "id": "iso-b3",
      "label": "B3",
      "family": "ISO B",
      "widthMm": 353,
      "heightMm": 500,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B3: 353 x 500 mm"
    },
    {
      "id": "iso-b4",
      "label": "B4",
      "family": "ISO B",
      "widthMm": 250,
      "heightMm": 353,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B4: 250 x 353 mm"
    },
    {
      "id": "iso-b5",
      "label": "B5",
      "family": "ISO B",
      "widthMm": 176,
      "heightMm": 250,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B5: 176 x 250 mm"
    },
    {
      "id": "iso-b6",
      "label": "B6",
      "family": "ISO B",
      "widthMm": 125,
      "heightMm": 176,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "ISO B B6: 125 x 176 mm"
    },
    {
      "id": "jis-b4",
      "label": "B4",
      "family": "JIS B",
      "widthMm": 257,
      "heightMm": 364,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://support.hp.com/us-en/document/bpq04022"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "JIS B B4: 257 x 364 mm"
    },
    {
      "id": "jis-b5",
      "label": "B5",
      "family": "JIS B",
      "widthMm": 182,
      "heightMm": 257,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "JIS B B5: 182 x 257 mm"
    },
    {
      "id": "jis-b6",
      "label": "B6",
      "family": "JIS B",
      "widthMm": 128,
      "heightMm": 182,
      "sources": [
        "https://www.mojoprint.jp/guide/international-paper-sizes.php",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "JIS B B6: 128 x 182 mm"
    },
    {
      "id": "us-letter",
      "label": "Letter",
      "family": "US sheet",
      "widthMm": 215.9,
      "heightMm": 279.4,
      "sources": [
        "https://support.hp.com/us-en/document/bpq04022",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "notes": "HP ANSI A dimensions; landscape orientation does not change sheet size",
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "US sheet Letter: 215.9 x 279.4 mm"
    },
    {
      "id": "us-tabloid",
      "label": "Tabloid / ANSI B",
      "family": "US sheet",
      "widthMm": 279.4,
      "heightMm": 431.8,
      "sources": [
        "https://support.hp.com/us-en/document/bpq04022",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "notes": "HP ANSI B dimensions; landscape orientation does not change sheet size",
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "US sheet Tabloid / ANSI B: 279.4 x 431.8 mm"
    },
    {
      "id": "env-dl",
      "label": "DL",
      "family": "Envelope nominal",
      "widthMm": 110,
      "heightMm": 220,
      "sources": [
        "https://opalenvelopes.co.uk/bespoke-envelopes-2/",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "notes": "Nominal finished envelope size, not guaranteed usable interior or postal eligibility",
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "Envelope nominal DL: 110 x 220 mm"
    },
    {
      "id": "env-c4",
      "label": "C4",
      "family": "Envelope nominal",
      "widthMm": 229,
      "heightMm": 324,
      "sources": [
        "https://opalenvelopes.co.uk/bespoke-envelopes-2/",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "notes": "Nominal finished envelope size, not guaranteed usable interior or postal eligibility",
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "Envelope nominal C4: 229 x 324 mm"
    },
    {
      "id": "env-c5",
      "label": "C5",
      "family": "Envelope nominal",
      "widthMm": 162,
      "heightMm": 229,
      "sources": [
        "https://opalenvelopes.co.uk/bespoke-envelopes-2/",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "notes": "Nominal finished envelope size, not guaranteed usable interior or postal eligibility",
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "Envelope nominal C5: 162 x 229 mm"
    },
    {
      "id": "env-c6",
      "label": "C6",
      "family": "Envelope nominal",
      "widthMm": 114,
      "heightMm": 162,
      "sources": [
        "https://opalenvelopes.co.uk/bespoke-envelopes-2/",
        "https://learn.microsoft.com/en-us/dotnet/api/system.drawing.printing.paperkind?view=windowsdesktop-10.0"
      ],
      "notes": "Nominal finished envelope size, not guaranteed usable interior or postal eligibility",
      "checkedAt": "2026-11-08",
      "method": "Publisher dimensional reference, independently normalized short side first",
      "uncertainty": "Nominal dimensions; no manufacturing tolerance or physical item measurement",
      "reviewStatus": "Builder source-read; not a standards-conformance or physical-item test",
      "version": "1.0",
      "rawDimensionalFact": "Envelope nominal C6: 114 x 162 mm"
    }
  ]
}