Tennis Ball Diameter Reference
Use this tennis ball diameter reference to check the published size range for an adult or junior ball in the unit you need.
Diameter range
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Diameter range
— mm
The endpoints are converted independently from the selected category’s published range.
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How the tennis ball diameter reference works
This tennis ball diameter reference looks up the selected adult or junior tennis ball category and shows its published diameter range. It is a tennis-specific equipment reference for players, coaches and court setup.
The selected range is converted endpoint by endpoint so millimeters, centimeters and inches remain equivalent displays. The source lists different ranges for standard, fast, slow, high-altitude and junior-stage balls.
cm = mm ÷ 10; inches = mm ÷ 25.4 These are published diameter ranges, not a measurement of a particular ball. Manufacturing wear and measurement method can affect an individual ball.
Tennis ball diameter FAQ
What is the standard tennis ball diameter?
The Type 2 standard/medium ball range is 6.54–6.86 cm, or 65.4–68.6 mm.
Are all tennis balls the same size?
No. Type 1, Type 2, Type 3 and high-altitude balls have category-specific ranges, and junior stage balls have their own ranges.
What is a Stage 3 tennis ball?
Stage 3 (red) is a junior-stage ball with a published diameter range of 2.76–3.15 inches.
Does this tool measure my ball?
No. It converts the published range for the category you select; it does not measure an individual ball.
Which unit should I use for court setup?
Use the unit required by your equipment notes or local specification. This tool provides the same range in millimeters, centimeters and inches.