Default size: Can put 9 cm x 5.5 cm cards in both side. We can make the card holder according to the size you provided (with in 10cm x 7cm) 

Material: Made by natural cork wood. Cork wood come from bark of cork oaks.
When a cork oak reaches 25 years old, a 1 inch-thick layer of cork bark is harvested without damage to the tree. The bark of mature cork oak can be harvested every nine years. After sterilization, cork bark is pressed flat into a thin cloth.

Production: Both sides are cork. Cork wood cloth is fixed on another linen fabric. Fasten by Elastic. 

Features: Both sides hold cards. Fine grain, soft touch, water resistant, durable.

You can also "ADD YOUR NAME" on it for just $9

You will Never find it from the market