Maharashtrian women are given two mangalsutras during the wedding. One is the long one without any hooks or openings and has two watis-- one is filled with kumkum and one with haldi at the time of the nuptials. The watis signify the union of the couple.
It has to be just worn around the neck like a garland and it doesn't have any openings because it's supposed to be a continuous circle without any breaks. This mangalsutra is not worn everyday but on occasions and during Shringaar. The daily mangalsutra is the smaller one which just a bit longer than a choker and usually very minimalistic single black chain and a wati in the centre.
So Sai will wear the smaller one everyday, if she wears one that is ☺️