Salvatore Ferragamo Sunglasses. Series number: SF257SK. Color code: 733. Shape: Square. Lens Width: 60 mm. 100% UV protection. Frame Material: Metal. Frame Color: Gold/Black. Lenses Type: Grey Gradient. Rim Style: Full-Rim. UPC/EAN code: 886895497800. Salvatore Ferragamo Grey Gradient Square Ladies Sunglasses SF257SK 733 60.