Made by hand in Brooklyn, NY. Set of 3 dainty stack rings measures 1mm. Hammered textured finish. Comes in only 14k gold at our location (variation pictured not available currently in Offering). 14k gold filled is a high quality hypoallergenic material composed of a thick sheet of 14k gold that is bonded to base metal and will never tarnish, chip or wear off. The gold layer on gold-filled jewelry is approximately 100 times thicker than gold-plate.