How heavy are the curling rocks?

This article may contain affiliate links. For details, visit our Affiliate Disclosure page.


Curling is a popular winter sport that originated in Scotland in the 16th century. It involves players sliding heavy stones across a sheet of ice towards a target area. The objective is to get the stones as close as possible to the center of the target. The sport is known for its precision, strategy, and teamwork. One of the key elements of curling is the weight of the stones. In this blog post, we will explore the question, “How heavy are the curling rocks?” in detail.

How heavy are the curling rocks?

The History of Curling Stones

Curling stones, also known as rocks, have been used in the sport for centuries. In the early days of curling, stones were made from any type of rock that could be found locally. These stones varied in size and weight, making it difficult to have a standard for the game. In the mid-19th century, granite was established as the material of choice for curling stones due to its durability, smoothness, and consistent weight. The first standardized curling stones were made in Scotland in the 1860s and weighed approximately 38 to 44 pounds (17 to 20 kilograms). Since then, the weight of curling stones has remained relatively consistent, with minor variations.

Regulations and Standards of Curling Stones

The World Curling Federation (WCF) is the governing body for curling worldwide. It establishes rules and regulations for the sport, including the weight and size of curling stones. According to the WCF, the weight of a curling stone must be between 38 and 44 pounds (17.24 to 19.96 kilograms). The maximum allowable diameter for a curling stone is 12 inches (30.48 centimeters), and the height must be between 4.5 and 5 inches (11.43 to 12.7 centimeters). These regulations ensure that all curling stones are standardized, making the game fair and competitive.

The Manufacturing Process of Curling Stones

The manufacturing process of curling stones is a complex and detailed one. It starts with selecting the right type of granite. The granite used for curling stones must be of high quality, free from cracks and impurities, and have a consistent grain structure. The granite is then cut into a cylindrical shape using a diamond-tipped saw. The rough cylinder is then shaped using a lathe, which removes any unevenness and ensures a smooth surface. The stones are then polished using a series of progressively finer grits until they have a mirror-like finish.

Adding the Handle to Curling Stones

Curling stones are equipped with a handle that allows the player to grip and release the stone. The handle is made of a synthetic material and is attached to the top of the stone using a threaded bolt. The handle is carefully positioned on the stone so that it is perfectly balanced. This ensures that the stone will slide straight and not deviate from its intended path. The handle also serves as a point of reference for the player, allowing them to judge the speed and trajectory of the stone.

The Weight of Curling Stones and Its Impact on the Game

The weight of curling stones is a critical factor that affects the gameplay. A heavier stone will travel farther and faster than a lighter one. This makes it useful for clearing out opponent stones or pushing them further away from the target. However, a lighter stone is easier to control and can be used for precision shots, such as a draw or a tap. The weight of the stones can also be adjusted by adding or removing weights inside the stone. This is done by drilling holes into the stone and inserting cylindrical weights. By adjusting the weight of the stone, players can fine-tune their shots and adapt to changing ice conditions.

The Importance of Standardization in Curling

The standardization of curling stones is crucial to the sport. It ensures that all players have access to stones that are consistent in weight, size, and shape. This creates a level playing field and allows players to focus on their skills and strategy rather than the equipment. It also makes it easier for players to adapt to different venues and competitions since they know what to expect from the stones.

The weight of curling stones is also important for ice conditions. The weight of the stone can affect the speed of the stone as it travels across the ice. If the ice is slow, a lighter stone may be needed to compensate for the lack of speed. Conversely, if the ice is fast, a heavier stone may be necessary to slow it down. The weight of the stone can also be affected by the temperature and humidity of the ice. As the ice changes, players must adjust the weight of their stones accordingly.


In conclusion, the weight of curling stones plays a crucial role in the sport of curling. It affects the gameplay, ice conditions, and the overall competitiveness of the game. Standardization ensures that all players have access to consistent stones, allowing them to focus on their skills and strategy. The manufacturing process of curling stones is complex, and the strict regulations established by the World Curling Federation ensure that all stones are made to the same specifications. Curling is a unique and fascinating sport that relies heavily on the precision and consistency of the equipment, making the weight of curling stones an essential element of the game.

How heavy are the curling rocks?
Scroll to top