There is no such pill that increase penis size. Most male enhancement pills are advertised as penis enlargement, but they are not meant to enlarge penis size permanently. Yes, these pills may help a better quality of erections, but increasing penis size permanently...they don't.
By the way, what is the size of your penis currently? Perhaps the way you see it small, it is not with your partner or wife.
However, if you are serious of increasing your penis size, don't just go with pills alone. It could a part of our penis enlargement journey, but it is not the primary thing that can help you achieve longer or thicker penis size.
What you can do is venture on penis exercises such as Jelqing and Kegel. These are the two most popular among penis exercises that are proven to be effective when done appropriately and consistently. But, you have to keep in mind, these exercises do not give you an instant results. Perhaps, consistent exercising will give you an increase in penis size within a month, 2 months, 6 months...or so.
There are also effective and safe penis enlargement devices that are on the market. These are safe and effective if you use them with care and follow the manufacturers' safety guidelines when it comes to proper usage.
Devices such as traction stretching and hydro pumps are among the effective ones that are good when use along with penis exercises and pills.
Having the goal to achieve longer and thicker penis is not an easy task. Plus, always take safety first before implementing anything as it can be harmful and results can be irreversible.
If you are into wearing loose pants even at work, traction stretching device could be a good start if you want to increase your member.