If you feel that your penis is too small and have looked for recommendations on the internet, it is the very worst place to look. All the ads are full of pics over-endowed studs who are more than likely porn stars, and will give you entirely the wrong idea.
Studies have shown that bigger is not always better, and that most women do not care about size. They reported that the most pleasure which comes from sex should be from the skills and technique of the man.