What cut do you get to start?

There is a lot of confusion when it comes to haircuts. I'm going to make it as simple as possible. For those wanting to start waves:

The guard you want to get cut to is: Curl Length

Curl length is the length at which your hair is long enough to curl. The longer your curl length, the higher you need to cut your hair. 

I'm coarse, so 2.5 WTG is the sweet spot for me.