{
 "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": "car-cup-holder-sizes",
 "name": "Car cup holder sizes: published ranges",
 "kind": "standard",
 "category": "Everyday mounts",
 "group": "Car interior",
 "year": null,
 "question": "What size is a car cup holder?",
 "tags": [
  "car",
  "cup holder",
  "cupholder",
  "adapter",
  "drinkware"
 ],
 "aliases": [
  "car cup holder size",
  "cup holder diameter",
  "cupholder adapter size",
  "cup holder insert",
  "car cup holder dimensions mm"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/car-cup-holder-sizes/",
 "sheet_txt": "https://xemstudio.com/objects/car-cup-holder-sizes/sheet.txt",
 "sheet": {
  "basis": "Not standardized. Published figures: an expandable cup-holder insert sized to fit vehicle cup holders 2.6–3.7 in (66.0–94.0 mm); a 40 oz Stanley Quencher, made to fit cup holders, is 75 mm across its base",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Car cup holders are not standardized. The figures here are ranges and sizes that products publish so they fit most holders; none is a holder size.",
   "Custom Accessories' expandable jumbo cup holder has a base that expands from 2.6 to 3.7 in (66.0–94.0 mm) to fit vehicle cup holders.",
   "Stanley's 40 oz Quencher H2.0 is 2.95 in (75 mm) at the base (REI listing), the size that made it fit most car cup holders.",
   "No holder geometry is drawn. For an insert or adapter, measure the top and bottom diameters and the depth of your holder, or wait for a scan."
  ],
  "table": {
   "columns": [
    "figure",
    "in",
    "mm",
    "from"
   ],
   "rows": [
    [
     "expander base range (fits vehicle holders)",
     "2.6–3.7",
     "66.0–94.0",
     "Custom Accessories (Ace)"
    ],
    [
     "Stanley Quencher 40 oz base",
     "2.95",
     "75",
     "REI"
    ]
   ]
  }
 },
 "sheet_text": "Car cup holder sizes: published ranges — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/car-cup-holder-sizes/  (CC BY 4.0)\nBasis: Not standardized. Published figures: an expandable cup-holder insert sized to fit vehicle cup holders 2.6–3.7 in (66.0–94.0 mm); a 40 oz Stanley Quencher, made to fit cup holders, is 75 mm across its base\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Car cup holders are not standardized. The figures here are ranges and sizes that products publish so they fit most holders; none is a holder size.\n- Custom Accessories' expandable jumbo cup holder has a base that expands from 2.6 to 3.7 in (66.0–94.0 mm) to fit vehicle cup holders.\n- Stanley's 40 oz Quencher H2.0 is 2.95 in (75 mm) at the base (REI listing), the size that made it fit most car cup holders.\n- No holder geometry is drawn. For an insert or adapter, measure the top and bottom diameters and the depth of your holder, or wait for a scan.\n\nfigure  in  mm  from\nexpander base range (fits vehicle holders)  2.6–3.7  66.0–94.0  Custom Accessories (Ace)\nStanley Quencher 40 oz base  2.95  75  REI\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Custom Accessories (listing by Ace Hardware): Expandable jumbo cup holder: base expands 2.6–3.7 in to fit vehicle cup holders — web — reference [verify license at link] — https://www.acehardware.com/departments/automotive-rv-and-marine/automotive-accessories/interior-automotive-accessories/8108507\n- REI: Stanley Quencher H2.0 FlowState tumbler 40 fl oz: 10.25 in tall (12.5 with straw), 2.95 in (75 mm) at the base — web — reference [verify license at link] — https://www.rei.com/product/220438/stanley-quencher-h20-flowstate-tumbler-40-fl-oz\n- MakerWorld (community): Car cupholder widening adapter — STL/3MF — varies per upload [verify license at link] — https://makerworld.com/models/94958\n- MakerWorld (community): 32 oz water bottle adapter for vehicle cup holders — STL/3MF — varies per upload [verify license at link] — https://makerworld.com/models/785877\n\nXem Studio scan: not needed; this is a published standard. The sheet is the geometry.\nAPI: https://xemstudio.com/api/geometry?object=car-cup-holder-sizes\n",
 "sources": [
  {
   "publisher": "Custom Accessories (listing by Ace Hardware)",
   "title": "Expandable jumbo cup holder: base expands 2.6–3.7 in to fit vehicle cup holders",
   "url": "https://www.acehardware.com/departments/automotive-rv-and-marine/automotive-accessories/interior-automotive-accessories/8108507",
   "formats": [
    "web"
   ],
   "license": "reference",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "REI",
   "title": "Stanley Quencher H2.0 FlowState tumbler 40 fl oz: 10.25 in tall (12.5 with straw), 2.95 in (75 mm) at the base",
   "url": "https://www.rei.com/product/220438/stanley-quencher-h20-flowstate-tumbler-40-fl-oz",
   "formats": [
    "web"
   ],
   "license": "reference",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "MakerWorld (community)",
   "title": "Car cupholder widening adapter",
   "url": "https://makerworld.com/models/94958",
   "formats": [
    "STL/3MF"
   ],
   "license": "varies per upload",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "MakerWorld (community)",
   "title": "32 oz water bottle adapter for vehicle cup holders",
   "url": "https://makerworld.com/models/785877",
   "formats": [
    "STL/3MF"
   ],
   "license": "varies per upload",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "stanley-quencher-40-oz",
  "car-air-vent-slats"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "stanley-quencher-40-oz",
     "why": "a 75 mm base fits most holders"
    }
   ]
  }
 ],
 "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": "What diameter is a car cup holder?",
   "a": "Not standardized. Inserts sold to fit most vehicles expand from about 66 to 94 mm (2.6–3.7 in); a 75 mm base fits most."
  },
  {
   "q": "How big is the base of a 40 oz Stanley?",
   "a": "2.95 in (75 mm) at the base."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/car-cup-holder-sizes/index.md"
}