These white plastic spice dispenser lids are custom-designed to fit Ball 4 oz mini mason jars, which have a 48 mm inside diameter. They are not regular-mouth lids, and they will not fit standard Ball or Kerr jars. Please check your jar size before ordering. Each lid features a convenient dual flip-top design with one side for shaking and one side for pouring. Whether you're storing dried herbs, chili flakes, or custom spice blends, these lids offer flexibility and function. Made in the USA from BPA-free, food-grade plastic, they snap on securely and bring a clean, professional look to your spice rack or gift set.