Vintage milk bottle caps, Lot of 50, ENGELHARDT'S DAIRY Bay City Mich., Vitamin D Milk, unused new old stock. See pictures for condition. You get 50 for one price. Size is appx. 1 7/16" in diameter. NOTE: All of the milk bottle caps I have listed are guaranteed to be 100% authentic originals. They are all clean and ready for display. Thank you for your purchase I appreciate it.