Women uncovering their hands in front of vendors … a wrong action
Question

                Many women who go out to the markets to buy things from shopkeepers uncover their hands. Some others uncover both the hand and forearm. This happens in front of people who are not their mahrams. What is the ruling on that?
Praise be to Allah.Undoubtedly, for women to uncover their 
          hands or forearms in the marketplace is a wrong action and a cause of 
          fitnah (temptation), especially since some of these women wear rings 
          on their fingers and bracelets on their wrists. Allaah says to the believing 
          women (interpretation of the meaning):
“And let them not stamp their feet 
          so as to reveal what they hide of their adornment” [al-Noor 24:31]  
          
This indicates that the believing 
          women should not show anything from which may be known what adornments 
          she is concealing, so how about those who uncover the adornments on 
          their hands so that people can see them?   
I advise the believing women 
          to fear Allaah and to give guidance priority over their own desires, 
          and to adhere to the command which Allaah gave to the wives of the Prophet 
           (peace and blessings of Allaah 
          be upon him), who are the Mothers of the Believers and the most perfect 
          women in good manners and chastity. Allaah said to them (interpretation 
          of the meaning): 
“And stay in your houses, and do not 
          display yourselves like that of the times of ignorance, and perform 
          As-Salaah (Iqamat-as-Salaah), and give Zakaah and 
          obey Allaah and His Messenger. Allaah wishes only to remove Ar-Rijs 
          (evil deeds and sins) from you, O members of the family (of the Prophet), 
          and to purify you with a thorough purification” [al-Ahzaab 33:33]  
          
So that they might have a 
          share of this great wisdom: 
“Allaah wishes only to remove Ar Rijs 
          (evil deeds and sins) from you, O members of the family (of the Prophet), 
          and to purify you with a thorough purification” [al-Ahzaab 33:33]  
           
I advise the believing men 
          whom Allaah has appointed as qawwaamoon (in charge) over women 
          to fulfil the trust which Allaah has placed on their shoulders and given 
          them responsibility over these women. So they should advise them and 
          teach them, and prevent causes of fitnah. They will be asked about that 
          when they meet their Lord, so let them think of how they will respond.  
          
“On the Day when every person will be confronted 
          with all the good he has done, and all the evil he has done, he will 
          wish that there were a great distance between him and his evil. And 
          Allaah warns you against Himself (His punishment) and Allaah is full 
          of kindness to (His) slaves” [Aal ‘Imraan 3:30] 
I ask Allaah to reform the 
          Muslims, men and women alike.