Tennis Ball Size: Official Dimensions & Weight Standards

By Sarah Miller · July 10, 2038

A standard tennis ball has a diameter of 2.575 to 2.7 inches (6.54 to 6.86 cm) and must weigh between 1.975 and 2.095 ounces (56.0 to 59.4 grams), as regulated by the International Tennis Federation (ITF).

Official Size and Weight Standards for Tennis Balls

The size and weight of a tennis ball are strictly defined by the International Tennis Federation (ITF) to ensure consistency in professional and amateur play. These specifications guarantee fair gameplay and predictable ball behavior on various court surfaces.

Key Dimensional Requirements

Diameter: 2.575 to 2.7 inches (6.54 to 6.86 cm)
Circumference: Approximately 8.1 to 8.5 inches (20.6 to 21.7 cm)
Weight: 1.975 to 2.095 ounces (56.0 to 59.4 grams)
Bounce height: Must rebound between 53 and 58 inches (135–147 cm) when dropped from 100 inches (254 cm) onto a concrete surface

Why Tennis Ball Size Matters

The precise dimensions of a tennis ball affect aerodynamics, speed, spin potential, and player control. Even minor deviations can alter game dynamics, especially at elite levels.

Impact on Gameplay

Aerodynamic Consistency: Uniform size ensures predictable air resistance and trajectory.
Spin and Control: Surface texture and size influence how much spin a player can generate.
Equipment Compatibility: Ball machines, training tools, and storage systems are designed to accommodate standard-sized balls.

Tennis Ball Specifications Across Playing Levels

While ITF standards apply globally, different types of tennis balls are used depending on age group, skill level, and court type. These variations still adhere to strict size guidelines but may differ slightly in felt composition and internal pressure.

Ball Type	Diameter (inches)	Weight (ounces)	Use Case	ITF Approved
Regular Duty (Adult)	2.575–2.7	1.975–2.095	Clay & indoor courts	Yes
Extra Duty (Adult)	2.575–2.7	1.975–2.095	Hard courts	Yes
Pressurized Training	2.575–2.7	1.975–2.095	Skill development	Yes
Low-Compression (Type 1)	2.575–2.7	1.76–1.88	Juniors (9–10 years)	Yes (Modified)
Green Dot (Type 2)	2.575–2.7	1.975–2.095	Juniors (11–12 years)	Yes
Red Foam/Foam Balls	2.7–3.0	0.63–0.95	Beginner kids (under 8)	No

Table data source:1, 2

The data shows that while official ITF-regulated balls maintain tight tolerances in size and weight, junior training balls vary significantly in mass and sometimes diameter to suit developmental needs. Red foam balls, though larger and lighter, are not ITF-approved but serve as introductory tools.

Frequently Asked Questions About Tennis Ball Size

What is the exact diameter of a regulation tennis ball?

A regulation tennis ball must have a diameter between 2.575 and 2.7 inches (6.54 to 6.86 cm), as specified by the ITF.

How much does a standard tennis ball weigh?

A standard tennis ball weighs between 1.975 and 2.095 ounces (56.0 to 59.4 grams).

Are all tennis balls the same size?

Official tournament tennis balls are required to be within the ITF's size range. However, training and junior balls may differ slightly in size and weight for developmental purposes.

Why do tennis balls have fuzzy felt covering?

The felt affects aerodynamics, controls speed, enhances grip for spin, and protects the rubber core. The thickness varies based on court surface—extra duty for hard courts, regular for clay.

Do high-altitude tennis balls differ in size?

No, high-altitude tennis balls are the same size but have higher internal pressure to compensate for thinner air, maintaining consistent bounce at elevations above 4,000 feet.