Dior 30Montaigneo S1I is a square acetate-and-metal optical frame from Dior, designed for everyday prescription wear with a refined, minimalist silhouette. Key attributes: Black | Acetate/Metal | Optical frames (prescription-compatible) | Square frame | Full-rim silhouette | Dimensions & fit: Eye size 54 mm | Composition & care: Acetate | Metal Colour: black