Well, there are many tips you can take to spot the fake ones. But in my opinion, the most common and best way is to check the label. First, you should know that they are made in china. So you can check the label which should be written with the words " made in china". Also, you can check the warranty. Kate spade sunglasses are very famous all around the world. These sunglasses have good design and achieving high quality and reputation. In this way, they can not only ensure you to get clear vision, but also can express your personality. Their frames are made of Plastic and different colors for options, such as Tortoise, Black, Navy. Also, they are created for Female, and particularly suitable for Adult. And all of them are made with equally distributed weight to create ultimate comfort. So I think it will be a good choice for you to have a try.