In September, they were sentenced to up to one year in prison and 91 lashes.
Their sentences have been suspended for three years, meaning that the punishment won’t be imposed if there is no further offense during that time.
Iran's decision, under mounting pressure, to allow women to attend was a small but significant victory for activists after years of campaigning."The Iranian authorities' decision to allow women to attend the Kish Island beach volleyball tournament is a step in the right direction," said Minky Worden, director of global initiatives at Human Rights Watch.
"It shows that sports federations like the FIVB have the power to enforce the basic requirement that all countries have to play by the rules and that they don't get a pass on discriminating against and excluding women." Women have been arrested and imprisoned for illegally attending volleyball matches in the past five years.
To date, the regime has had a harsh reaction to the idea of loosening strict enforcement of the hijab.