{
 "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": "bricks-and-blocks",
 "name": "Brick and concrete block sizes: US modular, UK, DIN 105 and CMU 4 to 12 in",
 "kind": "standard",
 "category": "Hardware",
 "group": "Building materials",
 "year": null,
 "question": "What size is a standard brick?",
 "tags": [
  "brick",
  "block",
  "cmu",
  "masonry"
 ],
 "aliases": [
  "standard brick size",
  "brick dimensions",
  "cinder block dimensions",
  "8x8x16 block actual size",
  "uk brick size"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 12,
 "url": "https://xemstudio.com/objects/bricks-and-blocks/",
 "sheet_txt": "https://xemstudio.com/objects/bricks-and-blocks/sheet.txt",
 "sheet": {
  "basis": "ASTM C216 / BIA modular sizes (nominal minus a 3/8 in joint), BS EN 771-1 UK work size, DIN 105 formats, ASTM C90 CMU actual sizes (nominal minus 3/8 in)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Concrete blocks are drawn as their outside envelope; core shapes vary by maker."
  ],
  "table": {
   "columns": [
    "unit",
    "length_mm",
    "width_mm",
    "height_mm"
   ],
   "rows": [
    [
     "US modular brick",
     193.7,
     92.1,
     57.1
    ],
    [
     "US standard brick",
     203.2,
     92.1,
     57.1
    ],
    [
     "US queen brick",
     193.7,
     69.8,
     69.8
    ],
    [
     "UK brick (BS EN 771-1 work size)",
     215,
     102.5,
     65
    ],
    [
     "DIN 105 NF (Normalformat)",
     240,
     115,
     71
    ],
    [
     "DIN 105 DF (Dünnformat)",
     240,
     115,
     52
    ],
    [
     "DIN 105 2DF",
     240,
     115,
     113
    ],
    [
     "CMU 4×8×16",
     396.9,
     92.1,
     193.7
    ],
    [
     "CMU 6×8×16",
     396.9,
     142.9,
     193.7
    ],
    [
     "CMU 8×8×16",
     396.9,
     193.7,
     193.7
    ],
    [
     "CMU 10×8×16",
     396.9,
     244.5,
     193.7
    ],
    [
     "CMU 12×8×16",
     396.9,
     295.3,
     193.7
    ]
   ]
  }
 },
 "sheet_text": "Brick and concrete block sizes: US modular, UK, DIN 105 and CMU 4 to 12 in — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/bricks-and-blocks/  (CC BY 4.0)\nBasis: ASTM C216 / BIA modular sizes (nominal minus a 3/8 in joint), BS EN 771-1 UK work size, DIN 105 formats, ASTM C90 CMU actual sizes (nominal minus 3/8 in)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Concrete blocks are drawn as their outside envelope; core shapes vary by maker.\n\nunit  length_mm  width_mm  height_mm\nUS modular brick  193.7  92.1  57.1\nUS standard brick  203.2  92.1  57.1\nUS queen brick  193.7  69.8  69.8\nUK brick (BS EN 771-1 work size)  215.0  102.5  65.0\nDIN 105 NF (Normalformat)  240.0  115.0  71.0\nDIN 105 DF (Dünnformat)  240.0  115.0  52.0\nDIN 105 2DF  240.0  115.0  113.0\nCMU 4×8×16  396.9  92.1  193.7\nCMU 6×8×16  396.9  142.9  193.7\nCMU 8×8×16  396.9  193.7  193.7\nCMU 10×8×16  396.9  244.5  193.7\nCMU 12×8×16  396.9  295.3  193.7\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ASTM: ASTM C216 Facing brick; ASTM C90 Loadbearing concrete masonry units — standard — ASTM; dimensions are facts [verify license at link] — https://www.astm.org/c0090-22.html\n- DIN: DIN 105 Clay masonry units — standard — DIN; dimensions are facts [verify license at link] — https://www.din.de/en\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 12 parts): https://xemstudio.com/files/hardware/bricks-and-blocks/index.json\nAPI: https://xemstudio.com/api/geometry?object=bricks-and-blocks\n",
 "sources": [
  {
   "publisher": "ASTM",
   "title": "ASTM C216 Facing brick; ASTM C90 Loadbearing concrete masonry units",
   "url": "https://www.astm.org/c0090-22.html",
   "formats": [
    "standard"
   ],
   "license": "ASTM; dimensions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "DIN",
   "title": "DIN 105 Clay masonry units",
   "url": "https://www.din.de/en",
   "formats": [
    "standard"
   ],
   "license": "DIN; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
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  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "dimensional-lumber",
  "euro-pallet"
 ],
 "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": "US modular brick?",
   "a": "7-5/8 × 3-5/8 × 2-1/4 in."
  },
  {
   "q": "8×8×16 block?",
   "a": "7-5/8 × 7-5/8 × 15-5/8 in."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "us-modular-brick",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/us-modular-brick.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/us-modular-brick.stl",
   "note": "US modular brick: 193.7 × 92.1 × 57.1 mm"
  },
  {
   "file": "us-standard-brick",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/us-standard-brick.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/us-standard-brick.stl",
   "note": "US standard brick: 203.2 × 92.1 × 57.1 mm"
  },
  {
   "file": "us-queen-brick",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/us-queen-brick.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/us-queen-brick.stl",
   "note": "US queen brick: 193.7 × 69.8 × 69.8 mm"
  },
  {
   "file": "uk-brick",
   "formats": [
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    "stl"
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/uk-brick.stl",
   "note": "UK brick (BS EN 771-1 work size): 215.0 × 102.5 × 65.0 mm"
  },
  {
   "file": "din-105-nf",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/din-105-nf.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/din-105-nf.stl",
   "note": "DIN 105 NF (Normalformat): 240.0 × 115.0 × 71.0 mm"
  },
  {
   "file": "din-105-df",
   "formats": [
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    "stl"
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/din-105-df.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/din-105-df.stl",
   "note": "DIN 105 DF (Dünnformat): 240.0 × 115.0 × 52.0 mm"
  },
  {
   "file": "din-105-2df",
   "formats": [
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    "stl"
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/din-105-2df.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/din-105-2df.stl",
   "note": "DIN 105 2DF: 240.0 × 115.0 × 113.0 mm"
  },
  {
   "file": "cmu-4x8x16",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-4x8x16.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-4x8x16.stl",
   "note": "4 in CMU (concrete block), 4×8×16 nominal: actual 3-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)"
  },
  {
   "file": "cmu-6x8x16",
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   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-6x8x16.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-6x8x16.stl",
   "note": "6 in CMU (concrete block), 6×8×16 nominal: actual 5-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)"
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  {
   "file": "cmu-8x8x16",
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   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-8x8x16.stl",
   "note": "8 in CMU (concrete block), 8×8×16 nominal: actual 7-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)"
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  {
   "file": "cmu-10x8x16",
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   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-10x8x16.step",
   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-10x8x16.stl",
   "note": "10 in CMU (concrete block), 10×8×16 nominal: actual 9-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)"
  },
  {
   "file": "cmu-12x8x16",
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-12x8x16.stl",
   "note": "12 in CMU (concrete block), 12×8×16 nominal: actual 11-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/bricks-and-blocks/index.md"
}