Golf Ferrule Sizes Explained: .335", .355", and .370"

Golf ferrules are small components, but choosing the correct size is important for proper fit and appearance when building or repairing a golf club. The most common ferrule sizes are .335", .355", and .370". However, the number alone does not always tell you which ferrule you need.

1. What Do .335", .355", and .370" Mean?

The numbers generally refer to the shaft tip diameter that the ferrule is designed to fit or be used with.

These are common applications, but they are not absolute rules. The correct ferrule should be selected according to the shaft, club head, and ferrule design.

2. .335" Ferrules

.335" ferrules are commonly used with wood shafts, particularly drivers and fairway woods. They are often used with golf adapters and club heads designed for .335" shaft tips. When replacing a .335" ferrule, check both the shaft tip diameter and the dimensions of the club head or adapter where the ferrule sits.

3. Ferrules for .355" Taper-Tip Shafts

Ferrules for .355" taper-tip iron shafts are commonly used on irons and wedges. However, the ferrule's actual inside diameter may not always be exactly .355", depending on its design. Because iron hosels and ferrules can also have different dimensions and shapes, shaft tip size alone may not be enough to determine the correct ferrule. Check the ferrule's inside diameter, outside diameter, length, and collar or step design.

4. .370" Ferrules

.370" ferrules are commonly used with parallel-tip iron shafts and many hybrid applications. As with other sizes, a .370" ferrule should not be selected based solely on the shaft diameter. The ferrule also needs to fit the club head or hosel design correctly.

5. Why Ferrule Dimensions Matter

Two ferrules intended for the same nominal shaft size can still have different dimensions. Important measurements include inside diameter (ID), which determines how the ferrule fits around the shaft; outside diameter (OD), which affects how closely it matches the hosel; length, which determines how far the ferrule extends; and collar design, which affects how the ferrule interfaces with the club head.

This is why a ferrule listed for a .335" or .370" shaft may not automatically fit every club using that shaft size.

Quick Checklist

Before choosing a golf ferrule, check the shaft tip size (.335", .355", or .370"), the club type, the ferrule's inside diameter, outside diameter, length, and whether the club requires a collared, stepped, or standard ferrule. The ferrule should fit the shaft correctly, while its outside diameter should be reasonably close to the hosel diameter for proper finishing.

Final Thoughts

Ferrule size is more than just the number shown in a product specification. For the best fit, consider the shaft tip size together with the ferrule's actual dimensions and the club head or hosel design.

Looking for ferrules for club building or repair? Browse our golf club ferrules in different sizes and styles.