From website: “The Viper is a statement-making neck-piece with a serpentine appearance. One side features a high-polish, curving shape that terminates at a venomous point. On the other side, the geometric latticework is joined via industrial chainlink and finished with our signature Glyph carabiner clasp. Materials: Stainless Steel. Opening is 40cm (16") in circumference. Can be enlarged by up to 10cm (4") using sizing chain.” I love this necklace! I always receive compliments and comments when I wear it. Unfortunately it doesn’t match my wardrobe very well, so I hope to send it to another home :) Worn < 10 times, will be buffed before I ship out. Will come with Vitaly dust cloth.