It is a XXXS Hooters Restaurant.
While we are discussing uniform sizing, I should mention that Hooters does not permit its staff to wear a size medium uniform shirt. As a consequence of this, female customers at Hooters can choose from three different sizes, either XS, XXS, or S. Of course, the reason for this is that the brand did not want to acknowledge the possibility that it might hire an individual who truly wore a size medium or large.
What a terrible event to have taken place! Because of this, Hooters can continue to indulge in their fantasy of only recruiting diminutive women by renaming the sizes of their uniforms. It is much simpler to uphold the Hooters girl image if the staff person with the most responsibility is a girl.