# Tennis ball size

> What is the diameter of a tennis ball?

- Category: Everyday objects › Sports balls
- Kind: Modern device
- Basis: ITF Rules of Tennis 2026, Appendix I
- Page: https://xemstudio.com/objects/tennis-ball/ · JSON: https://xemstudio.com/api/geometry?object=tennis-ball · Plain text: https://xemstudio.com/objects/tennis-ball/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/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 68.6 | 68.6 | 68.6 |

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

## Notes

- Tennis ball: Ø65.4–68.6 mm, 56.0–59.4 g (ITF Rules of Tennis 2026, Appendix I).
- The file is a sphere at the maximum diameter (holders sized to it fit every legal ball).

## Sizes

| dimension | value |
|---|---|
| diameter | 65.4–68.6 mm |
| mass | 56.0–59.4 g |
| rule | ITF Rules of Tennis 2026, Appendix I |

## Where the files are

- ITF: [ITF Rules of Tennis 2026, Appendix I](https://www.itftennis.com/media/7221/2026-rules-of-tennis-english.pdf) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/tennis-ball/index.json

- tennis-ball-max: [STEP](https://xemstudio.com/files/hardware/tennis-ball/tennis-ball-max.step) · [STL](https://xemstudio.com/files/hardware/tennis-ball/tennis-ball-max.stl) — Sphere Ø68.6 mm (maximum)

## Questions

**How big is a tennis ball?**

Ø65.4–68.6 mm.

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