30 x 28 mm Clear Perforated Shrink Band for Unicorn Bottles, Small Dropper Bottles, Small Vials, and Many Other Small Containers. [Compatible Diameter: 1/2"] - Bundle of 500 Shrink bands provide a professional look to your products while simultaneously offering a tamper evident safety seal. Not only is a tamper evident seal required in most cases, but it also gives your customers confidence that your product is safe for use. Layflat dimensions: 30 mm x 28 mm (1.18 in x 1.1 in) Works best for lids with a diameter of approximately 1/2" 2 Mil Perforated Clear PVC Plastic Examples of products this works best with: Unicorn bottles, small dropper bottles, small vials, and many other small containers. As there are many different types and sizes of containers, it is best to measure your specific diameter to ensure you purchase the correct size!