The guy gave you a lot of useful information, even if he didn't specifically answer your question. Given that your question is so basic, it sounded like you could use that information. There is no need for the attitude.

The answer I have for your question is that it depends a lot on the bike and on what look you are going for. I would not recommend the same bars for a 1977 Bob Jackson as for a 1972 Cinelli or for a 1955 Jack Taylor.

So, what are bike are you looking to fit, and what style of bars do you prefer?