{
 "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": "doona-car-seat-stroller",
 "name": "Doona car seat & stroller",
 "kind": "modern",
 "category": "Everyday mounts",
 "group": "Strollers & car seats",
 "year": null,
 "question": "What diameter is the Doona car seat & stroller handlebar?",
 "tags": [
  "stroller",
  "pram",
  "pushchair",
  "handlebar",
  "cup holder",
  "mount",
  "car seat"
 ],
 "aliases": [
  "doona handle diameter",
  "doona cup holder",
  "doona dimensions",
  "doona phone holder",
  "doona handlebar size"
 ],
 "overall_mm": {
  "length": 820,
  "width": 440,
  "height": 990
 },
 "official_cad": true,
 "xem_status": "planned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/doona-car-seat-stroller/",
 "sheet_txt": "https://xemstudio.com/objects/doona-car-seat-stroller/sheet.txt",
 "sheet": {
  "basis": "Published overall sizes only: Doona (official)",
  "overall_mm": {
   "length": 820,
   "width": 440,
   "height": 990
  },
  "notes": [
   "The handlebar and frame tube diameters (what a cup holder, phone mount or hook clamps to) are not published; they come with the scan.",
   "The Doona is an infant car seat with fold-out wheels; the same handle is the carry handle and the stroller handlebar.",
   "A measured Xem scan is planned; until then this page carries only the published numbers and no geometry.",
   "Safety: a child car seat's harness, buckle, tongues and chest clip are crash-tested as part of the seat. NHTSA advises that aftermarket products are not recommended for use with car seats unless made or allowed by the car seat's maker, and Transport Canada reports that child-restraint makers advise that no third-party aftermarket products be used with their seats. Geometry here is for reference and for accessories that do not touch the restraint system. It is not for replacement or modified buckles, harness or chest-clip parts, and nothing should attach to or change the harness or buckle."
  ],
  "table": {
   "columns": [
    "feature",
    "published value",
    "from"
   ],
   "rows": [
    [
     "unfolded (W × L × H)",
     "44 × 82 × 99 cm",
     "Doona"
    ],
    [
     "folded (W × L × H)",
     "44 × 66 × 57 cm",
     "Doona"
    ],
    [
     "weight",
     "7.8 kg",
     "Doona"
    ],
    [
     "handlebar height",
     "adjustable; not published",
     "Doona"
    ],
    [
     "handlebar Ø, frame tube Ø",
     "not published",
     "—"
    ]
   ]
  }
 },
 "sheet_text": "Doona car seat & stroller — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/doona-car-seat-stroller/  (CC BY 4.0)\nBasis: Published overall sizes only: Doona (official)\nCatalog version: 2026-10-20\n\nOverall (mm): length 820, width 440, height 990\n- The handlebar and frame tube diameters (what a cup holder, phone mount or hook clamps to) are not published; they come with the scan.\n- The Doona is an infant car seat with fold-out wheels; the same handle is the carry handle and the stroller handlebar.\n- A measured Xem scan is planned; until then this page carries only the published numbers and no geometry.\n- Safety: a child car seat's harness, buckle, tongues and chest clip are crash-tested as part of the seat. NHTSA advises that aftermarket products are not recommended for use with car seats unless made or allowed by the car seat's maker, and Transport Canada reports that child-restraint makers advise that no third-party aftermarket products be used with their seats. Geometry here is for reference and for accessories that do not touch the restraint system. It is not for replacement or modified buckles, harness or chest-clip parts, and nothing should attach to or change the harness or buckle.\n\nfeature  published value  from\nunfolded (W × L × H)  44 × 82 × 99 cm  Doona\nfolded (W × L × H)  44 × 66 × 57 cm  Doona\nweight  7.8 kg  Doona\nhandlebar height  adjustable; not published  Doona\nhandlebar Ø, frame tube Ø  not published  —\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Doona (official): Doona car seat & stroller: unfolded 44 × 82 × 99 cm, folded 44 × 66 × 57 cm, 7.8 kg — web — manufacturer spec [verify license at link] — https://www.doona.com/car-seat-stroller/collections/doona-deep-blue\n- NHTSA: Car seat glossary: aftermarket products are not recommended for use with car seats unless made or allowed by the car seat manufacturer — web — US government work [verify license at link] — https://www.nhtsa.gov/car-seats-and-booster-seats/car-seat-glossary\n- Transport Canada: Third-party aftermarket products for children's restraint systems — web — Government of Canada [verify license at link] — https://tc.canada.ca/en/road-transportation/defects-recalls-vehicles-tires-child-car-seats/third-party-aftermarket-products-children-s-restraint-systems\n\nXem Studio scan: planned. Mesh $8, STEP $19, target tolerance ±0.15 mm.\nAPI: https://xemstudio.com/api/geometry?object=doona-car-seat-stroller\n",
 "sources": [
  {
   "publisher": "Doona (official)",
   "title": "Doona car seat & stroller: unfolded 44 × 82 × 99 cm, folded 44 × 66 × 57 cm, 7.8 kg",
   "url": "https://www.doona.com/car-seat-stroller/collections/doona-deep-blue",
   "formats": [
    "web"
   ],
   "license": "manufacturer spec",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "NHTSA",
   "title": "Car seat glossary: aftermarket products are not recommended for use with car seats unless made or allowed by the car seat manufacturer",
   "url": "https://www.nhtsa.gov/car-seats-and-booster-seats/car-seat-glossary",
   "formats": [
    "web"
   ],
   "license": "US government work",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Transport Canada",
   "title": "Third-party aftermarket products for children's restraint systems",
   "url": "https://tc.canada.ca/en/road-transportation/defects-recalls-vehicles-tires-child-car-seats/third-party-aftermarket-products-children-s-restraint-systems",
   "formats": [
    "web"
   ],
   "license": "Government of Canada",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "planned",
  "sheet_free": true,
  "mesh_price_usd": 8,
  "step_price_usd": 19,
  "tolerance_mm": 0.15
 },
 "related": [
  "handlebar-clamp-rings",
  "phone-mount-ball-17mm",
  "car-cup-holder-sizes",
  "child-car-seat-harness-buckle"
 ],
 "fits": [
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "handlebar-clamp-rings",
     "why": "a clamp ring at the handlebar Ø once it is scanned"
    }
   ]
  }
 ],
 "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 the Doona car seat & stroller handlebar?",
   "a": "The maker does not publish it. A measured scan is planned; until then measure the bar where your part will sit."
  },
  {
   "q": "What are the Doona car seat & stroller dimensions?",
   "a": "unfolded (W × L × H): 44 × 82 × 99 cm; folded (W × L × H): 44 × 66 × 57 cm; weight: 7.8 kg."
  },
  {
   "q": "Can I make a replacement buckle, chest clip or harness part from this?",
   "a": "No. The harness, buckle and chest clip are tested with the seat; NHTSA advises against aftermarket products on car seats, and Transport Canada reports that seat makers do too. Replacement restraint parts come only from the seat's maker. This page is reference geometry for things that do not touch the restraint system."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "mesh",
   "status": "planned",
   "price_usd": 8,
   "target_tolerance_mm": 0.15
  },
  {
   "file": "step",
   "status": "planned",
   "price_usd": 19,
   "target_tolerance_mm": 0.15
  }
 ],
 "markdown": "https://xemstudio.com/objects/doona-car-seat-stroller/index.md"
}