With Ebony castanets, response is immediate and pronounced, perfect for acoustic live playing / dancing environments. Designed in the traditional way, with adjustable braided cord to fit any finger size. Perfect for flamenco, as a sound or cinema FX, and much more! Includes 2 pairs of Ebony castanets, each measuring 2-5/8 inches wide by 3-1/2 inches long (6.75 x 9 cm). We do not recommend these for beginners.