MOSCOW — By Russian standards, the news conference on Tuesday was unusual: an airing of grievances by two female flight attendants who had taken the rare step of suing Aeroflot, the country’s flag carrier, for age and sex discrimination.

The event took a bizarre twist, however, as two men defending the airline interrupted the proceedings to upbraid the two employees, talking about one’s breast size, and undercutting repeated assertions from Aeroflot that it had not discriminated by arguing that attractive flight staff were important for business.

Both sides focused on what they said was a move by Aeroflot in 2016 to enforce weight guidelines for its cabin staff, suggesting that women fit into a maximum clothing size of 48, equivalent to a 14 in the United States. Men were allowed somewhat more weight, according to an independent union representative.

The two women, Evgeniya V. Magurina and Irina N. Ierusalimskaya, who sued separately, said they were barred from international flights, losing a significant chunk of their potential paychecks, because their clothing sizes were larger. (Ms. Magurina said hers is 52.)