{
 "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": "tennis-ball",
 "name": "Tennis ball size",
 "kind": "modern",
 "category": "Everyday objects",
 "group": "Sports balls",
 "year": null,
 "question": "What is the diameter of a tennis ball?",
 "tags": [
  "ball",
  "sports",
  "tennis"
 ],
 "aliases": [
  "tennis ball diameter",
  "tennis ball size",
  "tennis ball dimensions"
 ],
 "overall_mm": {
  "length": 68.6,
  "width": 68.6,
  "height": 68.6
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/tennis-ball/",
 "sheet_txt": "https://xemstudio.com/objects/tennis-ball/sheet.txt",
 "sheet": {
  "basis": "ITF Rules of Tennis 2026, Appendix I",
  "overall_mm": {
   "length": 68.6,
   "width": 68.6,
   "height": 68.6
  },
  "notes": [
   "Tennis ball: Ø65.4–68.6 mm, 56.0–59.4 g (ITF Rules of Tennis 2026, Appendix I).",
   "The file is a sphere at the maximum diameter (holders sized to it fit every legal ball)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "diameter",
     "65.4–68.6 mm"
    ],
    [
     "mass",
     "56.0–59.4 g"
    ],
    [
     "rule",
     "ITF Rules of Tennis 2026, Appendix I"
    ]
   ]
  }
 },
 "sheet_text": "Tennis ball size — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tennis-ball/  (CC BY 4.0)\nBasis: ITF Rules of Tennis 2026, Appendix I\nCatalog version: 2026-10-20\n\nOverall (mm): length 68.6, width 68.6, height 68.6\n- Tennis ball: Ø65.4–68.6 mm, 56.0–59.4 g (ITF Rules of Tennis 2026, Appendix I).\n- The file is a sphere at the maximum diameter (holders sized to it fit every legal ball).\n\ndimension  value\ndiameter  65.4–68.6 mm\nmass  56.0–59.4 g\nrule  ITF Rules of Tennis 2026, Appendix I\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ITF: ITF Rules of Tennis 2026, Appendix I — web — Publisher's page; dimensions are facts — https://www.itftennis.com/media/7221/2026-rules-of-tennis-english.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/tennis-ball/index.json\nAPI: https://xemstudio.com/api/geometry?object=tennis-ball\n",
 "sources": [
  {
   "publisher": "ITF",
   "title": "ITF Rules of Tennis 2026, Appendix I",
   "url": "https://www.itftennis.com/media/7221/2026-rules-of-tennis-english.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": [
  "pickleball",
  "baseball",
  "softball-12-in",
  "softball-11-in",
  "table-tennis-ball",
  "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 tennis ball?",
   "a": "Ø65.4–68.6 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "tennis-ball-max",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tennis-ball/tennis-ball-max.step",
   "stl": "https://xemstudio.com/files/hardware/tennis-ball/tennis-ball-max.stl",
   "note": "Sphere Ø68.6 mm (maximum)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tennis-ball/index.md"
}