Use this four pack of Double Faced Snap Together Grommets to add a stylish accent and complete purses, bags, sweatpants, and any other project that may require a drawstring. These lightweight grommets are intended for use with 3/8 inch or 1/2 inch drawstring on materials measuring 1/8 inch to 3/8 inch thick. These Double Faced Snap Grommets measure 12mm in diameter (inside) and 23mm in diameter (outside).