Description White Mother of Pearl saxophone finger button inlay set 2.5mm (0.1") thickness polished on 1 side. Individual sizes Concave round button 6pcs 15.1 x 2.5mm, Convex round button 1pc 10.9 x 2.5mm Oval button 2pcs 11.9 x 24 x 2.5mm. All pcs are A grade.