STO436 — Women's Sunglasses by Tous. The STO436 pair showcases a metal butterfly silhouette designed for everyday use and special occasions alike. The look blends fashion with practicality, making it a standout choice for outdoor activities when you want a bold accessory. Tous injects its signature approachable femininity and meticulous craftsmanship into this Barcelona-based brand’s eyewear. Measurements: 57-16-135. The 57 mm width refers to each lens, the 16 mm bridge spans the nose, and the temples measure 135 mm. A 57 mm lens width tends to flatter oval, square, and rectangular face shapes. Frame and silhouette: The butterfly shape broadens the outer corners with a subtle downward curve, creating a striking, distinctly feminine vibe. The full-rim frame defines the lens outline and lends a solid, cohesive presence. Lenses: They provide UV400 protection, blocking 100% of UVA and UVB rays. With a category 2 tint, they are suitable for driving and medium-light conditions.