Description of the minbar of the Prophet (blessings and peace of Allah be upon him)
Question

                Well I am Shameem from Mauritius, I wanted to know the dimension of a minbar because in our Masjid, being a member of the adminstration, we do have a minbar which we were gifted but the fact that it is too big having more than three steps we are willing to resize it to three steps. That is why we are looking for the complete dimension of a minbar as the Prophet Muhammad used.

Please Brother help me out with this. I have searched the internet and did not find any clear answer. Preferably if the answer can be accompanied with an ahadeeth or any explanation from scholars.
Praise be to Allah.
    Al-Bukhaari (917) and Muslim (544) narrated from Abu Haazim 
    that a group of people came to Sahl ibn Sa‘d, and they had differed 
    concerning the minbar and what kind of wood it was made of. He said: By 
    Allaah, I know what kind of wood it is made of, and who made it, and I saw 
    the Messenger of Allaah (blessings and peace of Allah be upon him) the first 
    day he sat on it. I said to him: O Abu ‘Abbaas, tell us. He said: The 
    Messenger of Allaah (blessings and peace of Allah be upon him) sent word to 
    a woman of the Ansaar, saying: “Let your carpenter slave made me something 
    of wood from which I may speak to the people.” So he made these three steps, 
    then the Messenger of Allaah (blessings and peace of Allah be upon him) 
    ordered that it be placed in this spot. It was made of tamarisk wood from 
    al-Ghaabah (a wooded area near Madeenah). 

    Tamarisk is a tree that has no thorns. Al-Ghaabah is a 
    well-known place near ‘Awaali al-Madeenah. What is meant is that it was made 
    of this wood. 

    Ahmad (2415) narrated that Ibn ‘Abbaas said: The minbar of 
    the Messenger of Allah (blessings and peace of Allah be upon him) was short, 
    only three steps. Its isnaad is hasan. Al-Haythami said: It was narrated by 
    Ahmad and its men are the men of as-Saheeh. Majma‘ az-Zawaa’id, 
    2/386 

    Muslim (1017) narrated from the hadeeth of Jareer: He (i.e., 
    the Prophet (blessings and peace of Allah be upon him) prayed Zuhr, then he 
    ascended a small minbar. 

    Al-Daarimi (41) narrated from Anas ibn Maalik that the 
    Prophet (blessings and peace of Allah be upon him) used to stand on Fridays, 
    leaning his back on the trunk of a palm tree that had been set up in the 
    mosque, and he would address the people. Then a Byzantine came and said: 
    Shall I not make for you something on which you may sit, and it will be as 
    if you were standing. So he made for him a minbar that had two steps and he 
    would sit on the third. When the Prophet of Allah (blessings and peace of 
    Allah be upon him) sat on that minbar, the palm trunk made a groaning sound 
    like the lowing of a bull, until the mosque shook, out of sorrow for (the 
    departure of) the Messenger of Allah (blessings and peace of Allah be upon 
    him). So the Messenger of Allah (blessings and peace of Allah be upon him) 
    came down from the minbar and embraced it while it was groaning, and when 
    the Messenger of Allah (blessings and peace of Allah be upon him) embraced 
    it, it fell silent. Then he said: “By the One in Whose hand is the soul of 
    Muhammad, if I had not embraced it, it would have carried on like that until 
    the Day of Resurrection, out of sorrow for (the departure of) the Messenger 
    of Allah (blessings and peace of Allah be upon him).” 

    Narrated by Ahmad (21252) and ad-Daarimi (36) from the 
    hadeeth of Ubayy ibn Ka‘b. 

    Al-Albaani said in as-Saheehah (3/175): Its isnaad is 
    jayyid and it meets the conditions of Muslim. 

    Abu Dawood (1082) narrated that Salamah ibn al-Akwa‘ said: 
    Between the minbar of the Messenger of Allah (blessings and peace of Allah 
    be upon him) and the wall was a space that was sufficient for a sheep to 
    pass through.

    Classed as saheeh by al-Albaani in Saheeh Abi Dawood. 

    Al-Haafiz Ibn Rajab (may Allah have mercy on him) said: 

    The correct view is that the minbar had three steps, and it 
    remained like that during the time of the Rightly Guided Caliphs. A number 
    of scholars regarded increasing the height of the minbar as an innovation, 
    including Ibn Battah among our companions, and others. Some of the Shaafa‘is 
    regarded the very large minbar as makrooh, if it is too big for the mosque.

    End quote. Fath al-Baari by Ibn Rajab, 8/242 

    Ibn Hajar (may Allah have mercy on him) said: 

    The minbar remained as it was, with three steps, until it was 
    increased to six steps by Marwaan during the caliphate of Mu‘aawiyah. End 
    quote. 

    Fath al-Baari by Ibn Hajar, 
    2/399 

    An-Nawawi (may Allah have mercy on him) said: 

    The scholars said that the minbar of the Prophet (blessings 
    and peace of Allah be upon him) was three steps, as was stated clearly by 
    Muslim in his report. 

    From the saheeh hadeeths quoted above, it is known that the 
    minbar of the Prophet (blessings and peace of Allah be upon him) was small, 
    short and humble, made of wood, with three steps. The Prophet (blessings and 
    peace of Allah be upon him) used to deliver the khutbah from the second step 
    and sit down on the third. And the distance between his minbar and the wall 
    was a space that was sufficient for a sheep to pass through. So it did not 
    break up a row, and did not bother anyone. Rather it was a humble wooden 
    structure composed of three steps, with no adornment or engravings, and no 
    exorbitant expenditure. This is how the minbars should be in the mosques of 
    the Muslims. 

    You have done well in your desire to resize this minbar and 
    make it three steps. We ask Allah to guide you and help you to act in 
    accordance with the Sunnah. 

    For more information please see the answer to question no.
    34160 and
    97497 

    And Allah knows best.