1)Materials: river shell ,sea shell 2)Specification: 14L--40L 3)Thickness:1.6MM~3 ... 4)Color: various colors for yours 1)Materials: river shell ,sea shell2)Specification: 14L--40L 3)Thickness:1.6MM~ ... 's design ,particular logos and customized carvings are allowed.Shell buttons is made for casual clothes and a variety of ... and natural feeling, especially when it decorates white clothes shell button