Engrave the backing for slight personalization or to commemorate an event. Engrave the backing for subtle personalization or to commemorate an event. This stunning collection of Musical Instrument cufflink has been chosen and designed to the finest detail, to make these Musical Instrument Cufflinks a must have for any musician or music enthusiast. terling silver cufflinks by Ravi Ratan. - Sterling Silver - Approximately 5/8" x 5/8" - Straight whale backing.