More permanent natural solutions to increase its length and width include making dietary changes, getting more exercise, and losing weight around your midsection. Much simpler and safer than surgical enhancement, right? See Step 1 to learn more about how you can make your penis larger without resorting to drugs or surgery. 4. Medications to increase girth and length. Currently, there are several medications and creams that are believed to have vitamins and hormones. They claim that these will help increase the size of the penis by increasing the amount of blood in the area and promoting a longer erection.