Prada Linea Rossa PS 51IV PS51IV are designer semi-rimless glasses with soft rectangle shaped lenses. They are made of metal front and sides and feature a discrete brand logo on the sides. Prada Linea Rossa PS51IV are available in size 53x18 and 55x18. designerglasses.co.uk offers this frame in various colours including: Prada Linea Rossa PS51IV TFZ1O1 Grey Rubber, DG01O1 Black Rubber. At designerglasses.co.uk all designer glasses and sunglasses come with their own branded case and cleaning cloth.