{
 "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": "table-tennis-ball",
 "name": "Table tennis ball size",
 "kind": "modern",
 "category": "Everyday objects",
 "group": "Sports balls",
 "year": null,
 "question": "What is the diameter of a table tennis ball?",
 "tags": [
  "ball",
  "sports",
  "table"
 ],
 "aliases": [
  "table tennis ball diameter",
  "table tennis ball size",
  "table tennis ball dimensions"
 ],
 "overall_mm": {
  "length": 40,
  "width": 40,
  "height": 40
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/table-tennis-ball/",
 "sheet_txt": "https://xemstudio.com/objects/table-tennis-ball/sheet.txt",
 "sheet": {
  "basis": "ITTF Laws 2.3.1–2.3.2",
  "overall_mm": {
   "length": 40,
   "width": 40,
   "height": 40
  },
  "notes": [
   "Table tennis ball: Ø40 mm, 2.7 g (ITTF Laws 2.3.1–2.3.2).",
   "The file is a sphere at the maximum diameter (holders sized to it fit every legal ball)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "diameter",
     "40 mm"
    ],
    [
     "mass",
     "2.7 g"
    ],
    [
     "rule",
     "ITTF Laws 2.3.1–2.3.2"
    ]
   ]
  }
 },
 "sheet_text": "Table tennis ball size — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/table-tennis-ball/  (CC BY 4.0)\nBasis: ITTF Laws 2.3.1–2.3.2\nCatalog version: 2026-10-20\n\nOverall (mm): length 40.0, width 40.0, height 40.0\n- Table tennis ball: Ø40 mm, 2.7 g (ITTF Laws 2.3.1–2.3.2).\n- The file is a sphere at the maximum diameter (holders sized to it fit every legal ball).\n\ndimension  value\ndiameter  40 mm\nmass  2.7 g\nrule  ITTF Laws 2.3.1–2.3.2\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ITTF: ITTF Laws 2.3.1–2.3.2 — web — Publisher's page; dimensions are facts — https://cdn.megaspin.net/rules/pdf/2021/ittf-rules-2.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/table-tennis-ball/index.json\nAPI: https://xemstudio.com/api/geometry?object=table-tennis-ball\n",
 "sources": [
  {
   "publisher": "ITTF",
   "title": "ITTF Laws 2.3.1–2.3.2",
   "url": "https://cdn.megaspin.net/rules/pdf/2021/ittf-rules-2.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": [
  "tennis-ball",
  "pickleball",
  "baseball",
  "softball-12-in",
  "softball-11-in",
  "lacrosse-ball",
  "golf-ball"
 ],
 "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 a table tennis ball?",
   "a": "Ø40 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "table-tennis-ball-max",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/table-tennis-ball/table-tennis-ball-max.step",
   "stl": "https://xemstudio.com/files/hardware/table-tennis-ball/table-tennis-ball-max.stl",
   "note": "Sphere Ø40 mm (maximum)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/table-tennis-ball/index.md"
}