The first ever golf balls in Scotland were made from wood, usually from hardwoods like beech. These balls were not completely round in shape. Standardization began in the 1930s. In 1990 a uniform size and weight was agreed upon which was smaller than 1.680inches (42.67mm) in diameter. However, originally, before 1990, USA and Europe were having different sizes and weights.

Source: riccartonparkgolf.co.nz/