18k yellow gold over stainless steel rope style chain necklace and bracelet set . Thickness 4mm wide on the necklace and bracelet. Length necklace 16'' plus 2'' extension total 18'' adjustable , bracelet 7'' plus 2'' extension total 9'' adjustable. Both necklace and bracelet have a very secure lobster lock closure. It looks breathtaking!!!!. mb711gp