Pro Performance Practice Aids...Lower Your Handicap! SKLZ Putt Pocket Putting Aids Feature: Helps players improve the accuracy of their line and speed on putts of all lengths Fits in a standard golf hole, but has a 2.75" opening that forces the player to make putts on the high side of the hole Small hole opening makes real holes appear larger once the player is out on the course Perfect target for practicing at home or office Can use it as a practice hole (on the turf) on a crowded practice green Product dimensions: 5.5" diameter Practice Your Way To Better Golf!