Size of black spinel bead is 4.2 mm, SI - VS clarity, very good luster, medium color tone, 36.95 carats, 14 inches with rhodium plated clasp. We guarantee this marvelous item. Made from top quality material, superior craftsmanship, excellent polished to bring you this superb item at always lowest prices. Size, length and quantity are approximate but usually very close. The picture is a representation of what you will be getting. 100% Satisfaction Guaranteed, Lowest Prices and Best Quality. Please see purchase terms and combining items on Checkout page. Please feel free to contact us at siamfinegems@yahoo.com, we are happy to answer your question.