Hand dyed navy blue cotton rope. Silver plated clasp closure. Silver plated spacer beads. Hand wrapped yellow, white, and blue thread detail. The size conversions are as follows: XS = 6.5" S = 7" M = 7.5" L = 8" XL = 8.5" The most popular sizes for women are size S and M, while the most popular for men are L and XL.