[10Pcs Neck Lanyard]: Package includes 10pcs black neck lanyards, each lanyard is 16.34 inch(41.5cm) long, sufficient quantity for your daily use. [5 Sizes Silicone Rings]: A package containing 50pcs black silicone rings in 5 sizes, 8mm(0.31 inch), 13mm(0.51 inch), 16mm(0.63 inch), 18mm(0.71 inch), 20.5mm(0.81 inch). With 5 sizes available, can meet your different needs. [Silicone Material]: The anti-lost ring is made of quality silicone, reliable, lightweight, and soft, preventing from dropping things. [Easy To Use]: The loss-proof silicone rings can be used along with lanyards, also can be used separately as a decoration. You can carry it as you like, hang it on the key ring, suitable for any occasion, and protect your equipment in different ways. [Widely Used]: These pen silicone lanyard holders are great to hold some small stuff, such as cell phones, pens, keys, USB flash disk, small pendants and more, preventing them from loss or dirt; They are useful accessories for office, home and outdoor activities.