Mage Uniforms

At the mage temple, the students have uniforms according to their rank. It's not very formal. They don't HAVE to wear the uniforms at all times, but they usually do, and they wear them during field trips and stuff.
So, green mages are the youngest. Their first year of training is just the most basic stuff. Even people with pretty weak magic can pass. The only way you can't make it to the next level of training is if you don't seem cut out to do magic for a living. People with evil hearts, ex, can't pass on to the next level. .
Here's the uniform for green mages.

Then there's fledgling mages. That's usually the second two years of a kids training. A lot of kids don't make it past green mage status, but most of them make it past this stage.

Then they become apprentices. The length of time they're in this stage varies. They graduate when their master says they're ready. Their uniform is usually a mini-cape that varies in color according to their specialty.

And when master mages are on duty, they usually wear a long cloak. Its color and pattern also vary according to their specialty.
The fabric of all the uniforms is magic, of course. So no matter what the weather-hot or cold, the mage is the perfect temperature.