Should the dancer require a head-piece, the classical bun style allows for its secure fastening. A classical bun also shows the level of professionalism expected of the students by their ballet teachers. Mrs. Flynn tells the story of a couple rehearsing a pas de deux. The boy's costume caught his partner's looped earring, ripping it out. This painful outcome illustrates the reason ESB permits only stud or small circumference loop earrings.
Rings pose another danger.
They too can get caught on clothing, resulting in injury or a dancer may accidentally hit another. A stone or its mount can cut. Choking is always a hazard should the necklace snag on something. Glittering jewelry can also distract the teacher watching the class. An exasperated parent asked me to write on how to fit pointe shoes.