An alignment device for golf to be used as a practice aid for aligning a dominant eye of a user, a putter and a golf ball with a target line to a hole on a putting green, comprising a base comprising at least one alignment indicia and at least one alignment extension extending from the base, wherein the at least one alignment indicia of the base and the at least one alignment extension are configured to align the dominant eye of the user, the putter and the golf ball with the target line to the hole on the putting green.