The SMC1500 Clamp-On Sheet Music Bookplate from On-Stage clamps to a standard mic stand (sold separately) and holds sheet music, chord charts, books, tablets, and more. It measures 18 x 9.25" (W x H) and has a 1.5" deep lip that can hold an open book. A 6.6" support arm extends from the mounting clamp to the bookplate. A ball joint on the end of the arm allows you to set the bookplate to the desired viewing angle.