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Baseball (MLB) size
What is the diameter of a baseball (mlb)? · Modern device · basis: MLB Official Baseball Rules 3.01: 9–9¼ in circumference
Also called: baseball (mlb) diameter, baseball (mlb) dimensions, medidas pelota de béisbol, medidas bola de beisebol, Baseball Durchmesser, diamètre balle de baseball
Exact dimensions. True size, with no printing tolerance added.
- length
- 74.8 mm
- width
- 74.8 mm
- height
- 74.8 mm
Notes
- Baseball (MLB): Ø72.8–74.8 mm, 141.7–148.8 g (5–5¼ oz) (MLB Official Baseball Rules 3.01: 9–9¼ in circumference). Diameter = circumference ÷ π.
- The file is a sphere at the maximum diameter (holders sized to it fit every legal ball).
Baseball (MLB) size size chart
| dimension | value |
|---|---|
| diameter | 72.8–74.8 mm |
| mass | 141.7–148.8 g (5–5¼ oz) |
| rule | MLB Official Baseball Rules 3.01: 9–9¼ in circumference |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| MLB | MLB Official Baseball Rules 3.01: 9–9¼ in circumference | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
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Set it up →https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=baseball

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Questions
How big is a baseball (mlb)?
Ø72.8–74.8 mm.