... 36*24 inch. 2. mainly used as cork underlayment. 3. function is soundproof,thermal. Cork sheet 1. 6 mm thickness,sheet size ... ,heat insulation,ease stress crack for flooring. 3. Material is cork,eco-friendly and nontoxic material. 4. Very popular in north ... . Packing details:50 sheets/carton,150 cartons/20ft container . illustrating picture of underlayment usage