FREE SHIPPING ON ORDERS OVER $150
Flatball Swing Aid When you master hitting the Flatball, you will never hit a real golf ball fat or thin again! A regulation ball is 1 5/8? in diameter so your club can be anywhere up to 1 5/8? above the ground and you will still hit the ball since the flatball is only 1/4? tall, your club must be that close to the ground in order to hit it.