What is the smallest size of airtight material that should be used for a circular puncture wound about one inch in diameter?

For a circular puncture wound that is about one inch in diameter, it is essential to use an airtight material that adequately covers the wound while also extending beyond its edges to ensure proper sealing. The choice of a 6-inch by 6-inch square is appropriate because it provides a sufficient margin around the wound, allowing for effective adhesion to the skin. This margin is crucial in preventing air from reaching the wound and minimizing the risk of contamination or further injury.

Using a square of this size ensures that even if the material shifts slightly when applied or due to movement, there remains enough coverage to maintain the airtight seal. A larger size could suffice as well, but the 6-inch by 6-inch square strikes a balance between adequate coverage and practicality, avoiding unnecessary waste of material while still providing the necessary protection.