{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "8-inch-floppy-disk-200-mm",
 "name": "8 in floppy disk (200 mm)",
 "kind": "modern",
 "category": "Vintage forms",
 "group": "Retro media",
 "year": 1981,
 "question": "What are the exact dimensions of an 8 inch floppy disk?",
 "tags": [
  "floppy disk",
  "diskette",
  "retro media",
  "vintage computer",
  "storage"
 ],
 "aliases": [
  "8 inch floppy disk dimensions",
  "8 inch floppy size mm",
  "8\" diskette size",
  "disquete 8 pulgadas medidas",
  "disquete 8 polegadas",
  "Diskette 8 Zoll Maße"
 ],
 "overall_mm": {
  "length": 203.2,
  "width": 203.2,
  "height": 2.1
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/8-inch-floppy-disk-200-mm/",
 "sheet_txt": "https://xemstudio.com/objects/8-inch-floppy-disk-200-mm/sheet.txt",
 "sheet": {
  "basis": "ECMA-69, 200 mm flexible disk cartridge, double-density two-sided",
  "overall_mm": {
   "length": 203.2,
   "width": 203.2,
   "height": 2.1
  },
  "notes": [
   "An 8 inch floppy disk jacket is a 203.2 mm square (l1 = 203.2 ±0.4 mm, corners 90° ±30′) and between 1.2 and 2.1 mm thick overall (ECMA-69 §3.1). The central window is Ø58.40 ±0.15 mm, centred 101.6 mm from the reference edge — the middle of the jacket.",
   "The file is the jacket at the published size: 203.2 × 203.2 mm, drawn 2.1 mm thick (the standard's maximum overall thickness), with the Ø58.4 mm central window at the jacket centre; no printing allowance. Index and head windows are listed above but not modelled. "
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "jacket side (l1)",
     "203.2 mm ±0.4"
    ],
    [
     "corner angle",
     "90° ±30′"
    ],
    [
     "overall thickness (e2)",
     "over 1.2 mm, under 2.1 mm"
    ],
    [
     "gauge",
     "falls freely through a 2.6 mm slot, 150 mm deep"
    ],
    [
     "central window (d1)",
     "Ø58.4 mm"
    ],
    [
     "central window centre (l2)",
     "101.6 mm ±0.3 from the reference edge"
    ],
    [
     "index window (d2)",
     "Ø7.7 mm ±0.1 at l3 85.09 / l4 135.95 mm ±0.25"
    ],
    [
     "jacket wall and liner (e1)",
     "0.45 mm ±0.15"
    ]
   ]
  }
 },
 "sheet_text": "8 in floppy disk (200 mm) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/8-inch-floppy-disk-200-mm/  (CC BY 4.0)\nBasis: ECMA-69, 200 mm flexible disk cartridge, double-density two-sided\nCatalog version: 2026-10-20\n\nOverall (mm): length 203.2, width 203.2, height 2.1\n- An 8 inch floppy disk jacket is a 203.2 mm square (l1 = 203.2 ±0.4 mm, corners 90° ±30′) and between 1.2 and 2.1 mm thick overall (ECMA-69 §3.1). The central window is Ø58.40 ±0.15 mm, centred 101.6 mm from the reference edge — the middle of the jacket.\n- The file is the jacket at the published size: 203.2 × 203.2 mm, drawn 2.1 mm thick (the standard's maximum overall thickness), with the Ø58.4 mm central window at the jacket centre; no printing allowance. Index and head windows are listed above but not modelled. \n\ndimension  value\njacket side (l1)  203.2 mm ±0.4\ncorner angle  90° ±30′\noverall thickness (e2)  over 1.2 mm, under 2.1 mm\ngauge  falls freely through a 2.6 mm slot, 150 mm deep\ncentral window (d1)  Ø58.4 mm\ncentral window centre (l2)  101.6 mm ±0.3 from the reference edge\nindex window (d2)  Ø7.7 mm ±0.1 at l3 85.09 / l4 135.95 mm ±0.25\njacket wall and liner (e1)  0.45 mm ±0.15\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Ecma International: ECMA-69 (PDF) — web — Publisher's page; dimensions are facts — https://ecma-international.org/wp-content/uploads/ECMA-69_1st_edition_january_1981.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/8-inch-floppy-disk-200-mm/index.json\nAPI: https://xemstudio.com/api/geometry?object=8-inch-floppy-disk-200-mm\n",
 "sources": [
  {
   "publisher": "Ecma International",
   "title": "ECMA-69 (PDF)",
   "url": "https://ecma-international.org/wp-content/uploads/ECMA-69_1st_edition_january_1981.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "3-5-inch-floppy-disk-90-mm",
  "5-25-inch-floppy-disk-130-mm",
  "cd-dvd-discs"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "How big is an 8 inch floppy disk?",
   "a": "The jacket is 203.2 mm square and under 2.1 mm thick, with a Ø58.4 mm centre window (ECMA-69)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "8-inch-floppy-disk-200-mm-jacket",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/8-inch-floppy-disk-200-mm/8-inch-floppy-disk-200-mm-jacket.step",
   "stl": "https://xemstudio.com/files/hardware/8-inch-floppy-disk-200-mm/8-inch-floppy-disk-200-mm-jacket.stl",
   "note": "Jacket 203.2 mm square × 2.1 mm, Ø58.4 central window (ECMA-69 nominal)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/8-inch-floppy-disk-200-mm/index.md"
}