Here you'll find all sorts of info about the ninjas that appear in Naruto. What type of clothing they ware, their different rankings and the exams they have to take on their path of becoming a true shinobi. Basically all sorts of little know how's about the shinobi introduced in the series.
During the series you'll also notice some of the main characters wearing new outfits. Almost everyone's outfit changes when they make the time jump to the Naruto Shippuuden series.
Each village has a standard on how Chuunins and Jounins are distinguished. But as a whole, the Leaf Village is pretty lenient on ninja dresscode.
View Naruto clothing