EK 6515 Eyeglasses by Emmanuelle Khanh. Material: Acetate, Color: 16-55-OPT - Black, 311 - Dark Tan, 66-87-OPT - Pistachio Green, Size: 47-25-140. Emmanuelle Khanh's EK 6515 is the perfect addition to any eyewear collection. These beautifully crafted frames feature a minimalist design with a round, oversized shape that offers both style and comfort for your eyes. They are made of high-quality acetate, making them both lightweight and durable. When you slip on a pair of Emmanuelle Khanh EK 6511 eyeglasses, you'll experience both fashion and function at their best.