Description Product Details Warranty Information JONES NY 524 Tortoise: A classic retro square frame for men or women in a 51 medium size. Frame Material: Hand made acetate with spring hinges Fit: Medium 51 18 140 42 Comes with: Companion Case, Cleaning Cloth, 1oz. Eyeglass Cleaner Free Shipping (USA) Frame Size: Medium (49-52mm) Bridge Width: 18mm Color: Tortoise Shape: Square Material: Acetate Style: Full-Rim Spring Hinge: Yes newOptions: true 30-Day No-Hassle Guarantee