# Brick and concrete block sizes: US modular, UK, DIN 105 and CMU 4 to 12 in

> What size is a standard brick?

- Category: Hardware › Building materials
- Kind: Standard part
- 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)
- Page: https://xemstudio.com/objects/bricks-and-blocks/ · JSON: https://xemstudio.com/api/geometry?object=bricks-and-blocks · Plain text: https://xemstudio.com/objects/bricks-and-blocks/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Concrete blocks are drawn as their outside envelope; core shapes vary by maker.

## Sizes

| unit | length_mm | width_mm | height_mm |
|---|---|---|---|
| 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) | 215.0 | 102.5 | 65.0 |
| DIN 105 NF (Normalformat) | 240.0 | 115.0 | 71.0 |
| DIN 105 DF (Dünnformat) | 240.0 | 115.0 | 52.0 |
| DIN 105 2DF | 240.0 | 115.0 | 113.0 |
| 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 |

## Where the files are

- ASTM: [ASTM C216 Facing brick; ASTM C90 Loadbearing concrete masonry units](https://www.astm.org/c0090-22.html) — standard — ASTM; dimensions are facts (verify at link)
- DIN: [DIN 105 Clay masonry units](https://www.din.de/en) — standard — DIN; dimensions are facts (verify at link)

## Free STEP/STL (12 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/bricks-and-blocks/index.json

- us-modular-brick: [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) — US modular brick: 193.7 × 92.1 × 57.1 mm
- us-standard-brick: [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) — US standard brick: 203.2 × 92.1 × 57.1 mm
- us-queen-brick: [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) — US queen brick: 193.7 × 69.8 × 69.8 mm
- uk-brick: [STEP](https://xemstudio.com/files/hardware/bricks-and-blocks/uk-brick.step) · [STL](https://xemstudio.com/files/hardware/bricks-and-blocks/uk-brick.stl) — UK brick (BS EN 771-1 work size): 215.0 × 102.5 × 65.0 mm
- din-105-nf: [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) — DIN 105 NF (Normalformat): 240.0 × 115.0 × 71.0 mm
- din-105-df: [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) — DIN 105 DF (Dünnformat): 240.0 × 115.0 × 52.0 mm
- din-105-2df: [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) — DIN 105 2DF: 240.0 × 115.0 × 113.0 mm
- cmu-4x8x16: [STEP](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-4x8x16.step) · [STL](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-4x8x16.stl) — 4 in CMU (concrete block), 4×8×16 nominal: actual 3-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)
- cmu-6x8x16: [STEP](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-6x8x16.step) · [STL](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-6x8x16.stl) — 6 in CMU (concrete block), 6×8×16 nominal: actual 5-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)
- cmu-8x8x16: [STEP](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-8x8x16.step) · [STL](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-8x8x16.stl) — 8 in CMU (concrete block), 8×8×16 nominal: actual 7-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)
- cmu-10x8x16: [STEP](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-10x8x16.step) · [STL](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-10x8x16.stl) — 10 in CMU (concrete block), 10×8×16 nominal: actual 9-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)
- cmu-12x8x16: [STEP](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-12x8x16.step) · [STL](https://xemstudio.com/files/hardware/bricks-and-blocks/cmu-12x8x16.stl) — 12 in CMU (concrete block), 12×8×16 nominal: actual 11-5/8 × 7-5/8 × 15-5/8 in envelope (cores not drawn)

## Questions

**US modular brick?**

7-5/8 × 3-5/8 × 2-1/4 in.

**8×8×16 block?**

7-5/8 × 7-5/8 × 15-5/8 in.

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