One of the many rights of a woman upon a man at the time of Nikah is Mahr (Dowry).

Allah Ta’ala states in the Quran, “And give to the women (whom you marry) their Mahr (Dowry) with a good heart.”
(Surah Nisaa; V: 4)

Hereunder are three types of Mahr (Dowry):

1) *Minimum Mahr* : The minimum Mahr stipulated for a woman is 10 silver coins (dirhams). This is equivalent to 30.615 grams of silver and MK20,150 (as of November 17, 2020). A man cannot give a woman less that this amount as Mahr. Rasoolullah ﷺ said, “There is no Mahr less than 10 silver coins (dirhams)”
There is no maximum limit for Mahr. However, it is disliked in going to extremes in asking and giving exorbitant amounts of Mahr.

2) Mahr of the wives of Rasoolullah ﷺ
The Mahr that Rasoolullah ﷺ gave to most of his wives was 500 silver coins. This is equivalent to 1530. 9 grams of silver and $1,213 (as of November 17, 2020).
It is preferable (Mustahab) for a man to give a woman 500 silver coins at the time of Nikah if he can afford it.
Sayyiduna Abu Salama Radhiyallahu Anha says that she asked Aaisha Radhiyallahu Anha: “What was the amount of dower of Nabi ﷺ?”
She said: “It was twelve ‘uqiya and one nash (Islamic measurement).”
She said: “Do you know what is a nash?” I said: “No.” She said: “It is half of an ‘uqiya, which amounts to five hundred silver coins (dirhams), and that was the dower given by Rasoolullah ﷺ to his wives.”
(Sahih Muslim)

3) Mahr of Fatimah Radhiyallahu Anha
(Mahr Fatimi):
This refers to the Mahr given to Sayyidatuna Fathimah Radhiyallahu Anha by Sayyiduna Ali Radhiyallahu Anhu. One view holds that the amount given was the same as the Mahr of the wives of Rasulullah ﷺ (500 silver coins) while another view holds that its amount is 480 silver coins.
NB. Al-Mahmood, as well as several other Ulama bodies, uses the former view in calculating the Mahr Fatimi. In doing so, the practice of Rasulullah ﷺ in giving Mahr is incorporated as well.

And Allah Ta’ala Knows Best