Prada SPR01T 1AB-0A7 Mens Pilot Graduated Tinted Sunglasses Frames Black 56mm
Model Prada SPR01T. For example, the numbers 54 - 17 - 140 indicate 54mm - lens width, 17mm - bridge width, 140mm - arm width. Just like at the opticians it is necessary to have lenses fitted that match your prescription.