This package contains 20 sheets of circular shape pre-cut EXTRA THICK aluminum foil. Cover the top of your hookah bowl with one of the sheets. Make sure to have the shiny side down. Poke a bunch of tiny holes with a toothpick or a foil poker and you're ready to go. These hookah foils are convenient and easy to use. Each circular sheet measures 5" in diameter and will fit most hookah bowls.