Groove Depth

In order to help Officials rule on the groove depth “in the field”, a simple gauge has been developed which is available from The R&A or USGA at a reasonable cost.

The gauge consists of a small circular disc which has a raised, thin ridge running across the diameter. This ridge measures exactly 0.022 inches (0.559 mm) in depth, which offers a small tolerance suitable for measurements carried out “in the field”.