Costa Fernandina Del Mar Collection Sunglasses FramesDirect.com Costa Del Mar Designer Sunglasses SmartBuyGlasses Costa Fernandina Sunglasses Costa Fernandina Del Mar Collection Sunglasses FramesDirect.com Costa Del Mar Fernandina Brushed Gold Frame Green Mirror 580 Plastic Fernandina sunglasses in Brushed Gold with Blue Mirror, Polarized Glass. The Costa sunglasses fit guide is a range from Narrow, Regular to Wide with most people choosing Regular. Fit is a combination of both the size of the sunglasses and the features of the frame, together. The features of our sunglasses influence the way the sunglasses fit, like the hinges and temple construction. Use the fit guide to select a Costa sunglass frame that will be comfortable and perform for you.