In this 5 minute bit, we talk about treatment and chest tube size options for the simple pneumothorax.  Please see below for evidence related articles:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5334075/

http://jtd.amegroups.com/article/view/8006/html       

https://www.cookmedical.com/critical-care/in-favor-of-small-bore-the-efficacy-of-pigtail-catheters-for-pleural-and-pericardial-drainage/