Boys' ballet clothes may look ugly when they are big, so if the crotch is big, you can wear a little smaller or crotch protector, which won't look so big.
Ballet is a European classical dance, which is light, slow and elegant. It originated in the Italian Renaissance, flourished in France in the second half of the seventeenth century, and entered the most prosperous era in Russia at the end of the nineteenth century. One of the most important features of ballet is that the actress's toes point to the ground during the performance, so it is also called tiptoe dance. Famous ballet works include Swan Lake, Fairy and Nutcracker.