Silicone rubber rings can be used for mobile phones, key rings, pens, lanyards, USB flash drives, and some pen-like items.SpecificationColor: PinkMaterial: SiliconeSize: Outer Diameter is 17mm/0.7", size of the hole is 13mm/0.5", Height is 6mm/0.2". Silicone lanyard case for pens (outer diameter 13mm-25mm/0.51-0.94in).Packing List: 60 x Anti-Lost Silicone Ring HoldersAdvantageThe anti-lost silicone ring of the pen is made of good-quality soft silicone, which is lightweight and stable.InstructionThe silicone pendant holder has a small hole that allows the use of various lanyards to prevent items from being lost and stained and is suitable for any place.NOTEPlease confirm the size before purchasing.