The mesh opening size of steel wire mesh directly affects its performance. A smaller mesh opening size provides higher structural integrity and better support, making it suitable for applications that require strong and durable mesh, such as fencing or reinforcing concrete. On the other hand, a larger mesh opening size allows for increased visibility and airflow, making it more suitable for applications that prioritize ventilation or visibility, such as window screens or filtration systems. Ultimately, the mesh opening size should be chosen based on the specific requirements and intended use of the steel wire mesh.