Salvatore ferragamo Woman's sf 2790 54 16 140 Tortoise. Just frame no case The Salvatore Ferragamo SF2790 is a stylish, full-rim women's optical frame made of rectangular-shaped injected plastic. The "54 16" represents the lens width (54 mm) and the bridge width (16 mm), accompanied by a 140 mm temple length for an average, comfortable medium fit.