Sferoflex SF2296 Optical Frame pairs a classic square metal silhouette with the brand's adaptive elastic hinge for a comfortable, secure fit. Designed for prescription use, it ships with demo lenses that can be replaced by an optician and is offered in multiple frame sizes. Key attributes: Brown | Marrone | Metal | Elastic hinge for adaptive fit | Durable construction | Compatible with prescription lenses | Ships with demo lenses to be replaced by an optician | Available in multiple sizes (54 / 56 / 58) | Square frame | Shiny dark brown finish | Dimensions & fit: Calibre (eye size): 54 / 56 / 58 mm | Bridge: 18 mm | Temple length: 145 mm | Height: 39.0 / 41.0 / 42.0 mm | Recommended for heart, round and oval face shapes | Composition & care: Metal frame | Plastic demo lenses