Ray-Ban RB3756 Sunglasses pair a metal square frame with crystal blue lenses for clear vision and a contemporary look. Built for everyday wear, they suit a range of face shapes and can be fitted with prescription lenses. Key attributes: Gunmetal | Blue | Metal | Crystal lenses | Adjustable nose pads | Prescription-compatible | Supplied with original case and cloth | Square frame | Full-rim design | Logo-engraved temples | Dimensions & fit: Size 56 — Lens width: 56 mm; Bridge: 18 mm; Temple: 140 mm; Height: 46 mm | Size 59 — Lens width: 59 mm; Bridge: 18 mm; Temple: 140 mm; Height: 49 mm | Composition & care: Metal (frame) | Crystal (lenses) | Clean lenses with a microfiber cloth. Store in the provided case when not in use. Avoid abrasive cleaners and harsh chemicals.