You can Google it, Lapis_29, and find sizes for different particles.
Are you understanding how the virus is contained in droplets? That's sorta the key to the effectiveness of cloth masks.
Here is youtube video of Tucker's interview with Coronavirus whistleblower. She believes CV-19 was created in military lab in China and if I recall correctly believes it was released intentionally (please watch to be sure of this). Some are skeptical, but her Twitter account was suspended just recently which makes you think she is a threat to someone.
She's being called a whistle blower because she claims China knew of person to person transfer in December 2019 and kept it a secret. She does not have any inside info on the Wuhan lab or on the supposed creation of the virus. "Extraordinary claims require extraordinary evidence"... I haven't watched the video yet but she doesn't seem to have any evidence. Here's what it says on Wikipedia:
"Later in September, Yan co-authored a pre-print research paper named "Unusual Features of the SARS-CoV-2 Genome Suggesting Sophisticated Laboratory Modification Rather Than Natural Evolution and Delineation of Its Probable Synthetic Route." Three other researchers were listed as co-authors, but the SCMP was unable to find any prior work from them. The paper was uploaded to the Zenodo website, an
open-access repository where anyone can post their research. The paper is affiliated with the Rule of Law Society, founded by Steve Bannon and Guo Wengui. The Rule of Law Society had not previously published scientific or medical research. Yan had previously appeared on Bannon's "War Room" podcast.
According to the paper's abstract, "SARS-CoV-2 shows biological characteristics that are inconsistent with a naturally occurring, zoonotic virus" and that it could have been
created in a lab in approximately six months. According to Newsweek, several experts in evolutionary biology and infectious disease, including Jonathan Eisen and Carl Bergstrom, said the paper did not include new information, contained multiple unsubstantiated claims and had a weak scientific case. According to Angela Rasmussen, a virologist at Columbia University, the paper was "basically all circumstantial and some of it is entirely fictional".
After describing her newly published research paper in a Fox News interview with Tucker Carlson in mid-September 2020, Yan said she believed the Chinese government intentionally released the virus. Instagram and Facebook flagged posts of the interview on Tucker Carlson Tonight as false information about
COVID-19, saying that they repeated information “that multiple independent fact checkers say is false.”"https://en.m.wikipedia.org/wiki/li-meng_yan
Mike Pompeo said in May that the US had 'enormous evidence' that the virus was made in a Wuhan lab. Still waiting on that evidence as well...