This badge holder is made of silicone and has an internal size of 3 3/8" L × 2 1/8" W. There is also a transparent plastic shell on the inner layer to secure and protect the card. The size of the lanyard is 35 1/2" L × 5/8" W, made of polyester. It is suitable for trade fairs, concerts, offices, hospitals, police stations, schools, theaters, subways, public transportation, etc.