Thank you for your question. At 20, your body is fully developed, and while there are no proven natural methods to significantly increase penile length or girth, there are safe, medically supervised options to help achieve your goals. Techniques such as growth factor injections or advanced dermal fillers can enhance girth by stimulating tissue growth and providing natural-looking volume. These procedures are minimally invasive, require only local anesthesia, and allow for quick recovery. For modest length increases, fillers and regenerative therapies can provide some improvement in flaccid and erect appearance by supporting tissue structure. It’s important to set realistic expectations—dramatic size changes aren’t achievable naturally or with medical treatments. Gains of up to 0.8–1.2 inches in girth and modest increases in length are realistic with the right approach. We recommend consulting a physician specializing in male sexual health to evaluate your goals and explore safe, tailored options. Confidence often comes from understanding your body and choosing methods that prioritize safety and results.