Might as well present it in terms relative to the human beard, because fuck it why not. A beard-second is the distance the average human beard grows in one second, which is about 5 nanometers. The size of SarsCoV2 is approximately 20 beard-seconds. The size of the holes in the fabric of your mask can range from 1000 beard-seconds to 40,000 beard-seconds, so the size of the hole is 50 to 2000 times larger than the virus. Beard.