There are many ways to work with a graphic designer. Partnership options include working through an agency, using a platform like 99designs, or hiring them directly. However, you will want to be prepared to communicate clearly and often about what you want from the graphic designer. The more specific you can be when you fill out your request the more likely the final product will reflect your vision. Communicating clearly and minimizing revisions will hold down your expenses. Most graphic designers include one or two rounds of changes in their project price.