More popularly known as girth enhancement, non-surgical girth phalloplasty involves the use of injectable fillers to increase the width and circumference of the penile shaft. This procedure requires no general anaesthesia and is typically done within an hour (hence non-surgical). Typically, a patient will need 1-to-3 days of recovery, and can resume sex and/or masturbation in 7-to-14 days (depending on the filler and physician protocol).
Popular fillers include Hyaluronic Acid (HA), PMMA, and Ellanse. Below you'll find more detailed descriptions (which can also be seen here: https://phalloboards.info/general-forum.html