NOVICA Hand Blown Purple Recycled Glass Tall Tumblers, 15 oz 'Amethyst' (set of 6) Size: 5.5" H x 3.9" Diam.; Capacity: 15 oz. Authentic: an original NOVICA fair trade product in association with National Geographic. Certified: comes with an official NOVICA Story Card certifying quality & authenticity. Exceptional Artisan Quality by Javier and Efren. Product info: Blown glass