Fits 1/2 to full size violins and 12-15 violas. The “PSR SADDLE” violin viola shoulder rest. The “Saddle” provides support for both front and back sides of the shoulder, and is great for the performer who likes to position their instrument over their shoulder while they perform. One “PSR Elastic Band” and one “PSR Magic Strip” are currently included. Try the “STRAIGHT” or “ANGLED” placements for your preferred comfort, made of resilient contoured ergonomically designed foam with great memory to bounce back to its original shape. Our PATENT NUMBER 7,262,352 design curve assists proper placement for your shoulder rest.