The True Line Putting Mirror is a premium putting mirror with a ball cutout to putt directly from the green. Designed with alignment markers, the putting mirror helps practice consistent head and eye alignment by properly setting up each time. The path lines help guide a square takeback and follow through resulting in a more reliable stroke. The built-in slots can create putt gates with tees for almost any putter heads. The premium, non-slip mirror is a convenient size for throwing in almost any golf bag to take to and from the practice green. The mirror measures at a compact 6½” x 12”.