бале́тка

nounfemininecountable

1.
ballet flat, ballet pump, ballet shoeclothing
Она́ надела бале́тки и вы́шла на у́лицу.
She put on her ballet flats and went outside.
Usually plural: балетки. Refers to everyday flat shoes as well as actual ballet slippers.
2.
(rare) small flat case, ballet case, flat holdall
Он носи́л докуме́нты в ста́рой бале́тке.
He carried his papers in an old flat case.
Colloquial; a small rigid case or bag, originally for carrying ballet things.

Examples

Она положила балетки в сумку и пошла на репетицию.
She put her ballet shoes in her bag and went to rehearsal.
Балери́ны бы́ли в колготках, па́чках и балетках.
The ballerinas wore tights, tutus and ballet slippers.