Patent US 4,940,238

A golf putting practice system is disclosed which includes a spherical ball having the approximate weight and surface resiliency characteristics of a regulation golf ball but of increased diameter (in the range of 2 to 3 inches) but less than the diameter of a regulation golf putting hole and further wherein the surface thereof includes a pattern of dimples of configuration corresponding to that of a regulation golf ball but proportionately larger in accordance with the difference between the incrased diameter of the practice ball and the diameter of a regulation golf ball. The system further includes putting instructions prescribing certain putting drills based upon certain putting principles which drills utilize one or more practice balls to achieve proficiency of certain putting absolutes.