Sieve Set, U.S. Bureau of Standards qualityThese are the finest sieves available. National Institute of Standards and Technology approved. The holes in the screen are .187 inches. This allows the hardened steel balls in our kits to pass through while retaining the bullets in the sieve. The catch pan, sieve body and cover are made of heavy gauge polished brass. The strainer screen is stainless steel. The diameter of the sieve is 8 inches. Pleasing to look at and easy to use. Although they are functional, they would look good on your coffee table as a decorative conversation piece! Doubt if your wife would approve.