This stunning MMA (Metropolitan Museum of Art) necklace with item number 09-06075-7 is a vintage, 18k gold-plated piece from the 1980s. See pictures for more information provided on the description card. See pictures of my measurements: Width of disc is about 8mm Width of necklace is about 5½" from outer edges Weight is 151.6 grams Has MMA insignia on discs at both ends of hook clasp. Excellent condition, never worn. Smoke-free, pet-free home. MMA box, description cards and packaging, also in excellent condition, is included.