Also in addition to the ribbon rankings i have trained at a few places that dont have them. the places that do might not follow the color system either. The places i have trained in go yellow / blue / red / black. i never really got into the breakdown of how there achieved as i have never stayed at a school for very long as i have not come across a really good gym that wants to teach real muay thai. I only train once in a while at very good gyms i have come across in my travels.