Marlo Premium Concert Choral Folder9 1 4 x 12 This choral folder is a perfect fit for standard and octavo sized sheet music and will hold scores with 7 elastic stays on the spine and 2 expanded horizontal pockets. Originally designed as a performance folder for professional choirs, this top of the line legacy folder includes: comfortable padded exterior, sewn edges, brass corners, internal pencil pocket with mechanical pencil, internal retention strap and external clear hand strap on