Golf Ball

A golf ball is a small, hard, dimpled ball used in the sport of golf. Players hit it from the teeing ground toward the hole using clubs, and its size, weight, and performance are tightly regulated by the sport’s governing bodies.

What is a golf ball?

The golf ball is the only piece of equipment a golfer touches on every shot, which is part of why so much engineering goes into something the size of a plum. Beneath its dimpled white skin sits a layered structure built to convert the energy of a club swing into distance, height, and spin.

Golf balls are produced under specifications written into the Rules of Golf, the rulebook jointly maintained by the United States Golf Association (USGA) and The R&A. To be legal in tournament play, a ball must fall within strict limits on weight, diameter, symmetry, and how fast and far it travels off a test machine. Anything outside those limits is considered “non-conforming” and cannot be used in competition.

The modern ball has 300 to 500 small indentations called dimples, an inner core made from synthetic rubber, and a thin outer cover usually made of an ionomer resin or urethane. Together, those parts shape the ball’s behaviour from the moment a club face meets it to the moment it stops rolling on the green.

Golf ball specifications

The Rules of Golf set hard limits on what counts as a legal golf ball. Two numbers matter most: weight and diameter.

Specification	Limit	Source
Maximum weight	1.620 oz (45.93 g)	USGA / R&A Rules of Golf, Appendix III
Minimum diameter	1.680 in (42.67 mm)	USGA / R&A Rules of Golf, Appendix III
Symmetry	Must be spherically symmetrical	USGA / R&A Rules of Golf, Appendix III
Velocity, distance, dimple geometry	Tested against published technical limits	USGA / R&A

A ball can be heavier than a feather and smaller than a tennis ball, but only just. The 1.620-ounce ceiling and 1.680-inch floor have been in place for decades, and they exist to keep the game fair across players, equipment, and conditions.

There is one quirk worth knowing. Until 1990, The R&A allowed a slightly smaller ball, often called the “British ball,” in tournaments under its jurisdiction. The USGA never permitted it. The smaller diameter gave players a distance advantage, especially in wind, because a smaller ball produces a smaller wake behind it. Since 1990, the larger 1.68-inch ball has been the global standard.

Manufacturers also have to design balls so that the dimples are arranged symmetrically. They can vary in size and depth, but the overall pattern has to be balanced enough that the ball flies the same way no matter how it is oriented when struck.

How a golf ball is constructed

A modern golf ball is a multi-layer object, and the number of layers is one of the main ways manufacturers describe their products. The simplest balls have one layer. The most complex have five.

Construction	Layers	Typical use
One-piece	Single solid material, usually Surlyn	Driving ranges, mini-golf
Two-piece	Solid rubber core + Surlyn cover	Recreational play, distance-focused balls
Three-piece	Core + mantle layer + cover (Surlyn or urethane)	Mid-range performance balls
Four-piece	Core + two mantle layers + urethane cover	Premium balls, advanced players
Five-piece	Core + three mantle layers + urethane cover	Tour-level balls

The core is usually made from polybutadiene, a synthetic rubber that compresses sharply at impact and snaps back, transferring energy into the ball. Around the core sit one or more mantle layers, which fine-tune how the ball reacts to different shots. A driver swing compresses the ball more deeply than a wedge does, so a multi-layer ball can be engineered to behave differently depending on how hard it is hit.

The cover is the part players see. Two materials dominate. Surlyn is a thermoplastic resin developed by DuPont that is hard, durable, and inexpensive. Surlyn-covered balls tend to fly long and resist scuffs but spin less. Urethane is softer and more expensive, used on premium balls because it grips the clubface longer at impact and produces more spin, which gives skilled players sharper control on approach shots and around the green.

Compression is the last piece of the puzzle. It refers to how much the ball deforms when struck: higher-compression balls feel firmer, and reward fast swing speeds with more distance, while lower-compression balls feel softer and help slower swings get the ball in the air.

Why golf balls have dimples

Dimples are the most visually distinctive feature of a golf ball, and they exist for one reason: a smooth ball does not fly nearly as well as a dimpled one.

When a ball moves through air, it has to push that air out of the way. A smooth surface causes the air flowing over the back of the ball to separate cleanly, leaving a wide turbulent wake that drags the ball backward. Dimples disrupt that flow. They create a thin layer of small turbulent eddies that hugs the ball’s surface, which actually delays the larger separation of air behind the ball. The result is less drag and more lift, and the ball flies farther and stays in the air longer.

The numbers are striking. According to Foundgolfballs.com and aerodynamics testing cited in golf physics literature, a smooth ball hit by a good player travels roughly half the distance of a dimpled one.

Most modern balls carry between 300 and 500 dimples. Each is typically 0.13 to 0.16 inches across (about 3.3 to 4.1 mm) and around 0.01 inches deep (about 0.25 mm). Manufacturers tune the count, depth, and pattern to influence trajectory: shallower dimples generally produce higher ball flights, while deeper dimples produce flatter, more penetrating flights. The Titleist Pro V1, one of the best-selling premium balls, uses a 388-dimple pattern arranged to minimise gaps between dimples.

Types of golf balls

Beyond construction, balls are usually grouped by what kind of player they are made for and what they do best on the course.

Type	Built for	Trade-off
Distance balls	Slower swings, beginners, casual play	Long off the tee, less greenside spin
Tour / performance balls	Skilled players who want feel and control	Premium price, less durable urethane covers
Soft / low-compression balls	Slower swing speeds, players seeking softer feel	Slightly less distance on full shots
Range / practice balls	Repeated use at driving ranges	Hard cover, durable, blunt feedback
Coloured / high-visibility balls	Easier tracking in the air or in rough	Same conforming standards as white balls

Within each group, manufacturers compete on specifics: dimple count, mantle hardness, cover thickness, and even how the layers are bonded together. Two balls that look identical on the shelf can perform in noticeably different ways once they are airborne.

Golf ball vs. range ball

The ball a player carries onto the first tee is not the same ball they hit during warm-ups at the driving range, even though they look almost the same.

A standard golf ball is built for performance: predictable flight, responsive feel, and the spin profile a particular player wants. Range balls are built for survival. They use harder cores and tougher covers so they can be hit thousands of times, picked up by tractors, and washed in industrial machines without breaking down. Most are stamped with the word “PRACTICE” or marked with a stripe.

Range balls also tend to fly slightly shorter and feel duller off the clubface. That matters because golfers who only ever hit range balls can develop an inaccurate sense of how far their clubs go. Many ranges now use “limited-flight” range balls that travel even shorter than standard range balls, so the practice yardages are not the real-course yardages.

A brief history of the golf ball

Golf has been played for roughly six hundred years, and the ball has changed almost beyond recognition.

The earliest balls were probably wooden, carved from beech or boxroot in 14th-century Scotland. By the late 1400s, a leather pouch stuffed with cow hair (the “hairy” ball) was being imported from the Netherlands. The “featherie”, a hand-sewn leather ball stuffed with wet goose feathers, took over in the 17th century and stayed in use for more than two hundred years.

The modern ball came from two breakthroughs. In 1848, Reverend Robert Adams Paterson invented the gutta-percha ball, or “guttie”, made from heated tree sap that could be moulded into a sphere. It was cheap, repairable, and made golf affordable for the working class. Then in 1898, Coburn Haskell of Cleveland, Ohio, wound a length of rubber thread into a ball, found that it bounced almost to the ceiling, and the rubber-cored Haskell ball quickly displaced everything else. By the 1960s, DuPont’s Surlyn cover had replaced the older balata sap, and Spalding patented the first solid-core ball in 1967, opening the door to the multi-layer designs sold today.

Related Golf Terms

Driver — The longest and lowest-lofted club in the bag, used to hit the ball the greatest distance off the tee.
Dimples — The small indentations on a golf ball that create aerodynamic lift.
Front nine — Holes 1 through 9 on an 18-hole golf course.
Gimme — An informal concession of a short putt, not allowed in official play.
Gap wedge — A wedge between pitching and sand wedge loft (50-52 degrees).

Frequently Asked Questions

How much does a golf ball weigh?

A legal golf ball weighs no more than 1.620 ounces (45.93 grams). Most balls sold today are at or just under that limit, since heavier balls generally carry more momentum.

How many dimples does a golf ball have?

Most balls have between 300 and 500 dimples. The Rules of Golf set no specific number, only that the arrangement must be symmetrical. The Titleist Pro V1, for example, has 388 dimples.

What are golf balls made of?

Modern balls have a synthetic rubber core (usually polybutadiene), one or more mantle layers, and an outer cover made of either Surlyn or urethane. Older designs used balata sap, gutta-percha, leather, or wood.

Can a player use any golf ball in a tournament?

Only balls listed on the USGA and R&A “conforming balls” list may be used in tournaments governed by those bodies. Some events also apply a “one-ball” local rule, which requires a player to use the same brand and model for the entire round.

What happens if a player hits the wrong ball?

In stroke play, the player gets a two-stroke penalty and must correct the mistake by playing the right ball. In match play, the player loses the hole. The ball at rest belongs to whoever played it, and other players are expected not to touch it.

Sources

United States Golf Association. “Rules of Golf: Equipment Rules.” Accessed May 2026.
The R&A. “Rules of Golf, Appendix III: The Ball.” Accessed May 2026.
Wikipedia. “Golf ball.” Accessed May 2026.
Found Golf Balls. “History of the Golf Ball.” Accessed May 2026.
Professional Golfers Career College. “The Evolution of the Golf Ball.” Accessed May 2026.
GolfStatus. “7 Things You Didn’t Know About Golf Balls.” Accessed May 2026.