How should the size of an installed grip be measured?

The measurement of an installed grip should be taken 3 inches below the cap. This method provides a consistent way to assess the grip size, taking into account the portion of the grip that is actually being held by a golfer's hands during play.

When measuring from the grip cap, it allows for accounting the section where most golfers will actually have their hands positioned. This position is critical as it better represents the grip's feel and function when the club is used. It ensures that the measurement reflects the part of the grip that directly influences hand placement, grip pressure, and overall comfort during a swing.

Other measurement points, such as from the bottom of the grip or the midpoint, may not accurately represent the effective size that a golfer interacts with while holding the club. This could lead to incorrect fitting, potentially affecting performance, comfort, or control over time. Therefore, measuring 3 inches below the cap is the most reliable and practical approach for determining grip size.