{
 "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": "us-half-dollar",
 "name": "US half dollar size",
 "kind": "modern",
 "category": "Everyday objects",
 "group": "Coins",
 "year": null,
 "question": "What are the dimensions of a US half dollar?",
 "tags": [
  "coin",
  "us coin",
  "half dollar"
 ],
 "aliases": [
  "half dollar diameter",
  "half dollar size mm",
  "us half dollar dimensions"
 ],
 "overall_mm": {
  "length": 30.61,
  "width": 30.61,
  "height": 2.15
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/us-half-dollar/",
 "sheet_txt": "https://xemstudio.com/objects/us-half-dollar/sheet.txt",
 "sheet": {
  "basis": "United States Mint coin specifications",
  "overall_mm": {
   "length": 30.61,
   "width": 30.61,
   "height": 2.15
  },
  "notes": [
   "US half dollar: Ø30.61 mm, 2.15 mm thick, 11.34 g, edge 150 reeds."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "diameter",
     "30.61 mm (1.21 in)"
    ],
    [
     "thickness",
     "2.15 mm"
    ],
    [
     "mass",
     "11.34 g"
    ],
    [
     "edge",
     "150 reeds"
    ]
   ]
  }
 },
 "sheet_text": "US half dollar size — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/us-half-dollar/  (CC BY 4.0)\nBasis: United States Mint coin specifications\nCatalog version: 2026-10-20\n\nOverall (mm): length 30.61, width 30.61, height 2.15\n- US half dollar: Ø30.61 mm, 2.15 mm thick, 11.34 g, edge 150 reeds.\n\ndimension  value\ndiameter  30.61 mm (1.21 in)\nthickness  2.15 mm\nmass  11.34 g\nedge  150 reeds\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- US Mint: Coin specifications — web — Publisher's page; dimensions are facts — https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/us-half-dollar/index.json\nAPI: https://xemstudio.com/api/geometry?object=us-half-dollar\n",
 "sources": [
  {
   "publisher": "US Mint",
   "title": "Coin specifications",
   "url": "https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications",
   "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": [
  "coins-us-and-euro",
  "us-penny",
  "us-nickel",
  "us-dime",
  "us-quarter",
  "us-dollar-coin"
 ],
 "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 US half dollar?",
   "a": "Ø30.61 × 2.15 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "us-half-dollar-disc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/us-half-dollar/us-half-dollar-disc.step",
   "stl": "https://xemstudio.com/files/hardware/us-half-dollar/us-half-dollar-disc.stl",
   "note": "Ø30.61 × 2.15 mm disc"
  }
 ],
 "markdown": "https://xemstudio.com/objects/us-half-dollar/index.md"
}