The 54 will be the lens width. – Case (Brown or Black). RAY-BAN: Depending on your model, you may receive other a tan case or a black case. -Oakley 2008. We may also provide the manufacturer size chart.
And you can choose from a wide range of lens colours. Luxury Carbon Fiber: The carbon fiber material is unbreakable, flexible, anti-corrosive and skin-friendly. It is stronger than steel and lighter than aluminum.