There are several different types of frosting tips available. However, the most common can be broken down into three different categories: round, open star and closed star. There are various styles within these groupings as well, and depending on the pattern that you want left on top of your freshly baked cupcakes. This blog post gives you a quick breakdown of the different types and the styles within them, making it easy for you to choose one when necessary!
Source Anna and Blue