While size might not be everything, there is no denying that men all over the world are looking for ways to increase the length of their penis. Despite the numerous products and treatments available on the market, there aren’t all that many avenues for men who want to properly and permanently gain additional length.So far, one of the most promising programs has been the PeniSizeXL. It guarantees to add length and also improve sexual stamina. This review takes on these claims to see if they actually deliver on what is pledged:he PeniSizeXL is written by John Collins and guarantees that at the end of the program, you will be able to see an increase of between 2 to 4 inches. Here, the author prompts length extension by following two separate methods. The first involves the chemical process taking place within the body which is responsible for the growth of certain tissues and muscles.