New and Improved extra-comfortable foam material!Fits 1/2 - 4/4 Violins, and 12" and larger violas! The "PSR Original" Violin Shoulder Rest or Viola Shoulder Rest are made of Resilient Contoured Ergonomically Designed Foam with great memory to fit into any size case. Thicker side of foam will snuggle over the collarbone providing more height for the front of the instrument. The flat side that goes across the shoulder is perfect for those with shorter neck space. Choose the location and angle of placement for your preferred comfort. Our patented design curve assists proper placement for your Shoulder Rest. Includes one Clear Elastic Band with purchase.