Wow! These "Magic Pad" Stick On Shoulder Rests are so much fun! I love having my Yellow Duck hanging out with me when I practice. When we're together, I can play longer, with less fatigue, and enjoy playing more, because I'm more comfortable. Pick your favorite to help you with your playing. They are available in 3" and 4" diameters for growing violin and viola players. Choose your friend; Blue Whale, Red Crab, Green Frog, Yellow Duck, Orange Fish, Purple Shell, or the original Black Circle. The Artino "Magic Pad" stick on shoulder rest is a reusable peel-and-stick style adhesive pad that is easy to apply and remove, and makes playing more comfortable.