How Many Centimeters Is a Golf Ball? Official Size Explained

By Sarah Miller · December 4, 2049

A standard golf ball has a diameter of 4.267 centimeters, as defined by the official rules of golf set by the R&A and USGA.

Official Golf Ball Size Regulations

The size of a golf ball is strictly regulated to ensure fairness and consistency in the game. The Rules of Golf, jointly governed by The R&A and the United States Golf Association (USGA), specify exact dimensions for legal competition.

Key Rule Specifications

Minimum diameter: 1.68 inches
Equivalent in centimeters: 4.267 cm
Maximum weight: 1.620 ounces (45.93 grams)
No minimum weight specified
Spherical symmetry required

This regulation ensures that no player gains an unfair aerodynamic or roll advantage from using undersized or unusually shaped balls.

Golf Ball Size Comparison Across Brands

While manufacturers design golf balls with varying performance characteristics—such as spin control, durability, and feel—they must all adhere to the same size standards. Below is a comparison of popular golf ball models and their compliance with official size requirements.

Golf Ball Model	Diameter (inches)	Diameter (cm)	Weight (grams)	Tournament Legal?
Titleist Pro V1	1.68	4.267	45.93	Yes
Callaway Chrome Soft	1.68	4.267	45.85	Yes
Bridgestone Tour B XS	1.68	4.267	45.90	Yes
Srixon Z-Star	1.68	4.267	45.80	Yes
Volvik Vivid	1.68	4.267	45.75	Yes

Table data source:1, 2

All major golf ball manufacturers produce models that meet the 1.68-inch (4.267 cm) diameter requirement. Slight variations in weight exist due to materials and layer construction, but all conforming balls are within acceptable tolerances set by governing bodies.

Historical Changes in Golf Ball Dimensions

Golf ball regulations have evolved over time. Before 1990, the R&A allowed smaller balls known as "British balls," which could be as small as 1.62 inches (4.11 cm). In contrast, the USGA had already mandated the 1.68-inch standard.

Since 1990, a unified rule has been adopted globally: all tournament-legal golf balls must have a minimum diameter of 1.68 inches (4.267 cm), eliminating regional discrepancies.

Why Golf Ball Size Matters

The precise size of a golf ball influences several aspects of performance:

Aerodynamics: A consistent diameter ensures predictable flight patterns and drag coefficients.
Launch Monitor Accuracy: Tracking systems rely on standardized ball sizes for precise data measurement.
Hole Fit: The ball must fall cleanly into the cup (which is 4.25 inches wide), so size affects how easily it drops.
Fairness: Uniformity prevents players from gaining advantages through non-standard equipment.

Frequently Asked Questions About Golf Ball Size

How many centimeters is a golf ball in diameter?

A regulation golf ball has a diameter of exactly 4.267 centimeters, equivalent to 1.68 inches, as defined by the USGA and R&A.

Are all golf balls the same size?

Yes, all tournament-legal golf balls must have a minimum diameter of 1.68 inches (4.267 cm). While materials and internal structure vary, the external size remains standardized across brands.

Can a golf ball be larger than 4.267 cm?

Yes, a golf ball can be slightly larger than 4.267 cm as long as it meets other performance criteria, but it cannot be smaller. Most manufacturers produce balls very close to the minimum size to optimize flight efficiency.

Why is the golf ball size standardized?

Standardization ensures fair play, consistent performance, and compatibility with course features like holes and launch monitors. It also allows for accurate comparisons of player skill and equipment performance.

What happens if a golfer uses a non-conforming golf ball?

In official competitions, using a non-conforming ball results in disqualification. Players must use balls listed on the USGA’s Conforming Golf Ball List or approved by the R&A.