GU7840 — Women's Sunglasses The GU7840 sunglasses from Guess present a rectangular frame crafted from injection-molded plastic, designed for daily wear and for special occasions alike. The silhouette blends style with practicality, making them a reliable choice for outdoor activities where you want a bold statement accessory. They capture Guess’s carefree, alluring spirit in eyewear. Size: 57-16-140. The 57 mm figure refers to each lens width, 16 mm is the bridge width, and the temples measure 140 mm in length. A 57 mm lens width tends to flatter oval, square, and rectangular face shapes. Frame and construction: The rectangular shape yields an elongated profile with clean, straight lines that convey a contemporary, structured vibe. The full-rim design clearly defines the lens perimeter and adds visual heft to the overall look. Lens performance: The lenses offer UV400 protection, blocking 100% of UVA and UVB rays. With a category 3 tint, they’re suitable for driving and bright outdoor conditions.