These incredible earrings are "openwork" shells with small rhinestones at the tips and a large rhinestone at the top. They are screw-on style. The location of the screw is such that the large rhinestone would be in the front of the ear, with the shells "streaming" toward the back of the head. The varigated brown and white colors in the shells is simply stunning. These are fragile earrings, and care will be needed to store them so they do not get banged around. The earrings measure 1 3/4" x 1 1/8". They are some of the most unusual and beautiful earrings I have seen!