The lane and approach markings allow for a maximum of 7 guides embedded in or stamped on the approach at each of the following points: 2"-6", 3'-4', 6'-7', 9'-10', 11'-12', and 14'-15'. Seven targets (arrows) may be embedded into or stamped onto the lane 12'-16' distance past the foul line and must be uniform in length and in shape and must be at a maximum of 1 1/4" in width and 6" in length.