Both sides are transparent design to fit the card perfectly before your second layer of card sleeves. Ideal for card protection. You can use it as the strongest card protection sleeve for your first layer of sleeves. 

Perfect Fit Standard Size Hard (50pcs)
It is a "perfect size" hardware specification that is perfect for standard size cards.
You can use it as the strongest card protection sleeve.
Also, if you use it with other standard size sleeves, you will enjoy a harder game feeling.

Size: 64 x 89 mm
Thickness: 0.1 mm
Number of sheets: 50