Slip the Meisel Chin-Chum on your chinrest for extra comfort. Chin-Chum can also help eliminate irratation from perspiration. Hand-washable. Comes in three sizes. The large size will fit full-size violin and 14" or bigger viola. The medium will fit 4/4-3/4 violin and 13"-14" viola. The small will fit 1/16-1/2 sized violins.