PACKAGE: The package includes 4 pieces glasses necklace chains in 4 different patterns with 4 pairs anti-skid ear hooks and anti-skid buckles, easy to attach to your glasses. MATERIAL: Lanyard eyewear straps are made of premium jewelry meterial, sturdy with elegant design, fashionable and stylish,lightweight for longtime wear. ITEM SIZE: Glasses necklace chains are approx. 65 cm/ 25.6 inches in total length, long enough for you to wear the eyeglasses on your neck, can protect glasses from lenses scratches. DESIGN: Crystals sunglasses chains both ends have adjustable holder loops with metal coil, adjust the metal rings to control the tightness of the silicone loops according to your glasses. APPLICATION: Spectacle eyeglass chains are suitable for sunglasses,myopia,reading glasses,spectacles,and other types of glasses,nice for both outdoor ans indoor activities.