Golf Flags, the flags on top of the sticks used to mark each hole on a golf course, were first mentioned in 1875, although golf historians believe they were used way before 1875. The USGA doesn’t require flags to be attached to flagsticks therefore some golf courses top the sticks with other adornments — but the majority of golf courses maintain the tradition by using polyester or nylon flags. The size of flags varies by golf course. The flagstick itself, however, is regulated by the USGA. The stick must be in circular shape and no more than 3/4 inch in circumference. This allows enough room for the ball to drop into the cup. Also, it can not be padded or covered with soft material that can influence the reaction of a ball that hits it.