Update 10/20/2019: A new metastudy done by scietists from Italy and the UK reviewed several non-surgical and surgical approaches to increase penis size and evaluated their risks. The results are fully in line with out own and support the statement that penis surgery and almost all of the devices and pums sold for enlargement present a high risk and very limited results.
Definitely yes, if you have a big or small penis is mostly defined by your genes. Sons of men with a large penis often have a large penis. Sons of men with a small penis often have a smaller penis. There are certainly exceptions, but in general genes are very dominant when it comes to erect penis size. From my own experience and research, genetics are the most dominant factor in size, environmental factors or lifestyle only have very limited to no effects.
Dark chocolate can help you improve your sexual life and increase the blood flow thanks to its high content of flavonol.  Many men like eating dark chocolate as it is the best variety of chocolate. Dark chocolate is rich in cocoa and low in sugar. Certainly, this type of chocolate offers you plenty of calories to supply the energy required for your sexual activity. Actually, dark chocolate is one of the best tips on how to make your penis bigger that you should know, especially if you want to increase your penis size through diet.

As you rise to the occasion, your penis contains spongy erectile tissue that fills with blood, thus determining the size of your erection. Unfortunately, the tissue isn’t easily changed, according to Walsh. "These fibrous cylinders are fixed to the pelvic bone, and by virtue of being fixed to the pelvic bone, they are not easily manipulated,” he says. “They are fixed in place, and for most men, the length of the penis that they achieve through puberty becomes their maximum length.”

Don't bother with stretching or weight-hanging. These two techniques are said to lengthen the penis, and in some cases they do. But the longer it gets, the thinner it gets; both methods cause the penis to lose girth as it stretches out. The only time to use a penis stretcher is after having surgery, when it's necessary to prevent the accumulation of scar tissue.

You can also try penis traction, a clinically tested method with a penis extender. “A penis extender applies traction to your penis and stretches it over a longer period of time — up to six hours per day. The constant stretch to which the penis is exposed, called cytokinesis, causes natural cell division, which results in a longer and thicker penis,” says Stacy Rybchin, founder & CEO of My Secret Luxury. Once your cells have grown and your penis size has increased, you will keep your extra penis length and girth forever.
Some men are born with what’s called a micropenis, defined by the American Urological Association as a stretched penile length of 7.5 centimeters or less. Micropenis is a condition with varying degrees of severity and may include a hormonal imbalance. Having a micropenis does not necessarily make you a good candidate for any or all penis enlargement surgeries.
For the best results, our research shows that you have to calculate three to six months for significant results. The success of penis exercises varies, some guys are really lucky and see a measurable growth in just a few weeks, for some guys it takes a little longer. Don’t give up if you don’t get fast results, every penis is a little different, but jelqing already worked in ancient egypt, so it will work for you, too.
Exercise your pelvic floor. You may not be able to build up the penis itself through exercise, but if you strengthen your pelvic floor your body will be better able to hold blood in your penis. The pelvic floor presses on the vein that keeps blood from leaving the penis during erections. You can strengthen your pelvic floor using Kegel exercises. A trial conducted in Britain concluded that men who performed Kegel exercises experienced better sexual function than those who made other lifestyle changes but didn't perform the exercises.[8]
If you want to improve your penis size effectively, you should work out every day. When you do physical exercise, your body will be in good shape, your self-esteem is also improved. Whenever you feel good, you will feel more satisfied about sex, and you will increase penis size accordingly. I will share with you several effective penis exercises that are extremely effective:

A high-quality penis sleeve can provide extra length and girth. “It can also be of help when a man has difficulty maintaining an erection. The problem with many sleeves [...] is that they are made of toxic chemicals and/or are porous, so they can hold bacteria and germs, even HPV. If a man is with multiple partners, these would not want to be shared. My client with lifelong ED swears by his silicone sleeve. Even with his penile implant, he says his wife enjoys the extra length,” says Yelverton.
If you are looking for tips on how to make your penis bigger naturally at home, you should not look down pumpkin seeds, yet try to consume them more for good. Pumpkin seeds can help you increase the size of your penis naturally and effectively. By increasing the blood flow to your penis, these seeds play a vital part in your diet plan for penis because they have high content of vitamin E.
Penuma is a permanent silicone that’s been cleared (though not yet fully approved) by the U.S. Food & Drug Administration (FDA) for penile enhancement. It’s made of malleable, medical-grade silicone, so it looks and feels like a natural penis. This relatively new procedure is currently performed only in select cities in the U.S., but we expect its popularity and availability to grow. Its manufacturer claims that clinical studies have shown very low adverse-event rates (infection in 3% of cases and seroma [fluid buildup] in 5% of cases) and high patient satisfaction.
How do penis extenders work? There are two fastening points: “One at the base of the penis and one just before the glans," says Rybchin. These connect to bars or rods that "extend the length of the extender. The bars or rods are lengthened by the wearer to stretch the penis over time. Where design differences come into play is the mechanism by which the rods are lengthened and the comfort features (such as padding) of the device itself."
Sliding elongation is sometimes used in men who have experienced a shortening of the penis due to Peyronie's disease. The procedure involves the temporary "degloving" of skin and underlying tissues from the shaft of the penis. The constricted sheath surrounding the shaft is then severed, allowing the penis to straighten and lengthen. While the surgery does not involve any grafting, nerve injury is possible.
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