Feature: 100% Brand new and high quality Wear polarized sunglasses to see the test card; you will see the hidden pattern This is the most convenient and fast way to judge whether the polarized sunglasses is authentic Take it and distinguish the real polarizer Description Material:Hard Paper Card Color: As picture shwon Size:Approx. 6*3.8cm/2.4*1.5inch Pattern Type: Character Item Type: Eyewear Accessories Use for: To Test Whether The Sunglass Is Polarized Package Included: 10PC Test Card Note: 1.Our size are Asian Size,1-2 size smaller than euro size,please choose your size according to the size chart. 2.Due to the hand measurement, there have size error about 1-2 cm.Item color displayed in photos may be showing slightly different