These chits have been cut from 2mm MDF, specifically for use with the  "To the Strongest!" ancient and medieval rules. This pack includes approximately 40 TtS! ammo markers, 15mm in diameter and marked on one side with an arrow. This will be sufficient for most TtS armies, but you may wish to purchase two packs if you are providing ammo for your opponent's army, too, or plan to "darken the sky" like Xerxes.