The results showed that the mechanical properties of WPCs were affected by particle size and fiber content. The WPCs made from particle sizes 50-70 mesh gave the higher mechanical properties (flexural strength, flexural modulus, tensile strength and tensile modulus) than that of others particle. The particle sizes greater than 70 mesh has the highest value of hardness. The value of flexural strength and tensile strength of WPCs decreased with the increase in fiber content. On the other hand, the value of flexural modulus, tensile modulus and hardness were increased with the increase in fiber content.