Antique Signed LA NACRE PARIS Mother Of Pearl Opera Glasses. They have high quality Mother of Pearl and are in excellent condition. They open and close perfectly and have excellent optical quality. They measure across the bottom from side to side 3-7/8 inches. From side to side across the top they measure 3-1/2 inches. When closed they measure 2-3/8 inches high. When fully extended they measure 3 inches high. They are in good pre owned condition commensurate with age and use.