Material: Black Walnut/Bamboo/Birch/Cherry/Beech/ Basswood/Maple/Birch/Sapele etc. Size: 85x54mm, 40x40mm,42x26mm or customized. Shape: Retangular / Oval /Round /Square or customized Thickness: 1.3mm for normal wooden card, 1.4mm+/-0.1mm for waterproof wooden card