... :Diameter: 10MM-300MMThickness: 0.3MM-1.0MMWidth: 1MM-20MM Available color:Transparent, semi-transparent, white, black, red, yellow, blue, purple, fluorescence ... , mail cover, stationery, note, book. And, can be as fashion hair band of lady. Environmental performance:Conformity with the European ROHS ... too much pressure when use, to avoid hurt people. TPU hair band