Is it essential to move one’s ring when doing wudoo’ and ghusl?
Question

                Is it essential for a man or woman to move a ring when doing ghusl for janaabah?.
Praise be to Allah.
    If the ring is loose enough for water to get underneath it, 
    then it is not necessary to move it. But if it is so tight that water cannot 
    get underneath it except by moving it, then it has to be moved. That applies 
    in both wudoo’ and ghusl. 

    It says in al-Mawsoo‘ah al-Fiqhiyyah (11/30): 

    The majority of fuqaha’ are of the view that it is 
    obligatory, when doing wudoo’, to move one’s ring when washing the hand, if 
    it is tight and he does not know whether the water is reaching the skin 
    underneath it. But if the ring is loose, or if it is tight but he knows that 
    the water can reach underneath it, then he does not have to move it; rather 
    it is mustahabb. End quote. 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) was 
    asked: Is it essential to move one’s ring and watch when doing wudoo’? He 
    replied: The fuqaha’ said that it is Sunnah to move them. 

    But if it is tight, it is essential to move it, because if it 
    is not moved the water will not reach what is underneath it and Allah, may 
    He be glorified and exalted, says (interpretation of the meaning): “…wash 
    your faces and your hands (forearms) up to the elbows …” [al-Maa’idah 5:6]. 
    So it is essential to wash the entire hand, from the fingertips to the 
    elbow.

    End quote from Liqa’ al-Baab al-Maftooh, no. 232 

    And Allah knows best.