{
 "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": "chicken-eggs",
 "name": "Chicken egg size: length × breadth by egg size, USDA weight classes, 3D egg models",
 "kind": "standard",
 "category": "Everyday objects",
 "group": "Kitchen",
 "year": null,
 "question": "How big is a chicken egg in mm?",
 "tags": [
  "egg",
  "kitchen",
  "food",
  "incubator"
 ],
 "aliases": [
  "egg dimensions mm",
  "large egg size",
  "egg size chart",
  "egg holder 3d print",
  "egg stl"
 ],
 "overall_mm": {
  "length": 56.2,
  "width": 42.96,
  "height": 42.96
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 4,
 "url": "https://xemstudio.com/objects/chicken-eggs/",
 "sheet_txt": "https://xemstudio.com/objects/chicken-eggs/sheet.txt",
 "sheet": {
  "basis": "Peer-reviewed measurement of 2,476 eggs from nine genotypes (length, breadth, weight); USDA size classes by weight per dozen",
  "overall_mm": {
   "length": 56.2,
   "width": 42.96,
   "height": 42.96
  },
  "notes": [
   "Measured means: egg-type hens (supermarket eggs) 56.2 × 43.0 mm, 58.3 g; meat-type hens 59.1 × 44.1 mm, 64.6 g; small standard breeds 51.3 × 39.8 mm, 45.4 g. Overall 57.9 × 43.5 mm.",
   "Breadth / length (shape index) about 0.75; the widest point sits slightly toward the blunt end (modelled with the Hügelschäffer egg curve).",
   "US sizes are by weight per dozen, not dimensions: Jumbo 30 oz, Extra Large 27, Large 24, Medium 21, Small 18, Peewee 15 (minimums). A US Large egg averages at least 56.7 g, close to the egg-type mean above.",
   "Holders and incubator trays: size the seat for the breadth (43–44 mm for Large / Extra Large) and let the egg sit blunt end up."
  ],
  "table": {
   "columns": [
    "egg",
    "length_mm",
    "breadth_mm",
    "weight_g"
   ],
   "rows": [
    [
     "egg-type hens (mean)",
     56.2,
     42.96,
     58.34
    ],
    [
     "meat-type hens (mean)",
     59.05,
     44.06,
     64.62
    ],
    [
     "standard breeds (mean)",
     51.33,
     39.78,
     45.4
    ],
    [
     "all 2,476 eggs",
     57.88,
     43.52,
     61.88
    ],
    [
     "USDA Large (min per egg)",
     null,
     null,
     56.7
    ],
    [
     "USDA Extra Large (min per egg)",
     null,
     null,
     63.8
    ],
    [
     "USDA Jumbo (min per egg)",
     null,
     null,
     70.9
    ]
   ]
  }
 },
 "sheet_text": "Chicken egg size: length × breadth by egg size, USDA weight classes, 3D egg models — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/chicken-eggs/  (CC BY 4.0)\nBasis: Peer-reviewed measurement of 2,476 eggs from nine genotypes (length, breadth, weight); USDA size classes by weight per dozen\nCatalog version: 2026-10-20\n\nOverall (mm): length 56.2, width 42.96, height 42.96\n- Measured means: egg-type hens (supermarket eggs) 56.2 × 43.0 mm, 58.3 g; meat-type hens 59.1 × 44.1 mm, 64.6 g; small standard breeds 51.3 × 39.8 mm, 45.4 g. Overall 57.9 × 43.5 mm.\n- Breadth / length (shape index) about 0.75; the widest point sits slightly toward the blunt end (modelled with the Hügelschäffer egg curve).\n- US sizes are by weight per dozen, not dimensions: Jumbo 30 oz, Extra Large 27, Large 24, Medium 21, Small 18, Peewee 15 (minimums). A US Large egg averages at least 56.7 g, close to the egg-type mean above.\n- Holders and incubator trays: size the seat for the breadth (43–44 mm for Large / Extra Large) and let the egg sit blunt end up.\n\negg  length_mm  breadth_mm  weight_g\negg-type hens (mean)  56.2  42.96  58.34\nmeat-type hens (mean)  59.05  44.06  64.62\nstandard breeds (mean)  51.33  39.78  45.4\nall 2,476 eggs  57.88  43.52  61.88\nUSDA Large (min per egg)  None  None  56.7\nUSDA Extra Large (min per egg)  None  None  63.8\nUSDA Jumbo (min per egg)  None  None  70.9\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Turkish Journal of Agriculture - Food Science and Technology: Weight and shape-related traits in eggs from different chicken genotypes — web — Publisher's page; dimensions are facts — https://agrifoodscience.com/index.php/TURJAF/article/download/7298/3431/63025\n- Eggland's Best: USDA egg size classes (weight per dozen) — web — Publisher's page; dimensions are facts — https://www.egglandsbest.com/faqs/egglands-best-egg-sizes-determined\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/chicken-eggs/index.json\nAPI: https://xemstudio.com/api/geometry?object=chicken-eggs\n",
 "sources": [
  {
   "publisher": "Turkish Journal of Agriculture - Food Science and Technology",
   "title": "Weight and shape-related traits in eggs from different chicken genotypes",
   "url": "https://agrifoodscience.com/index.php/TURJAF/article/download/7298/3431/63025",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Eggland's Best",
   "title": "USDA egg size classes (weight per dozen)",
   "url": "https://www.egglandsbest.com/faqs/egglands-best-egg-sizes-determined",
   "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": [
  "golf-ball",
  "k-cup-pods"
 ],
 "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 large egg?",
   "a": "About 56–58 mm long and 43 mm across (≈58 g)."
  },
  {
   "q": "How are US egg sizes defined?",
   "a": "By weight per dozen: Large is at least 24 oz a dozen."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "egg-layer-56.2x43.0",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/chicken-eggs/egg-layer-56.2x43.0.step",
   "stl": "https://xemstudio.com/files/hardware/chicken-eggs/egg-layer-56.2x43.0.stl",
   "note": "Chicken egg, egg-type hens mean: 56.2 × 43.0 mm (≈58 g, US Large)"
  },
  {
   "file": "egg-meat-type-59.1x44.1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/chicken-eggs/egg-meat-type-59.1x44.1.step",
   "stl": "https://xemstudio.com/files/hardware/chicken-eggs/egg-meat-type-59.1x44.1.stl",
   "note": "Chicken egg, meat-type hens mean: 59.1 × 44.1 mm (≈65 g, US Extra Large)"
  },
  {
   "file": "egg-small-51.3x39.8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/chicken-eggs/egg-small-51.3x39.8.step",
   "stl": "https://xemstudio.com/files/hardware/chicken-eggs/egg-small-51.3x39.8.stl",
   "note": "Chicken egg, standard breeds mean: 51.3 × 39.8 mm (≈45 g)"
  },
  {
   "file": "egg-cup-large",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/chicken-eggs/egg-cup-large.step",
   "stl": "https://xemstudio.com/files/hardware/chicken-eggs/egg-cup-large.stl",
   "note": "Egg cup / tray cell for Large eggs (Ø43 breadth)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/chicken-eggs/index.md"
}