The X Marks the Spot Trail Tacks from Allen are highly reflective trail markers designed to help you navigate trails. This pack includes 20 tacks: 17 arrows and 3 “X” tacks, used to mark key trail points. The tracks are large and easy to handle, so you don’t have to fumble. The arrow tacks measure 3/4″ x 9/16″, and the “X” tacks measure 1″ x 1″. The sturdy points are easy to press into many outdoor surfaces, and the reflective material is easy to spot in the daylight or at night with a flashlight.