Large Piano / Keyboard Diagram Stickers (50 Sticker Per Pack) AT CHECKOUT! A great product for teachers and students! Simply peel off a piano diagram sticker. Stick it on your favourite music or in your notebook. Fill in a chord, scale, or notes with a pen or pencil! Simply peel off a piano diagram sticker. Stick it on your favourite music or in your notebook. Fill in a chord, scale, or notes with a pen or pencil! Amazing learning aid for students and teachers. Each pack comes with 50 large stickers (4'' x 2'')