Large Piano / Keyboard Diagram Stickers (50 Pack) Super handy for students and teachers! A great time saving product! 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! Great for learning new patterns, chords and theory. Amazing learning aid for students and teachers. Each pack comes with 50 large stickers (4'' x 2'')