1. The people in the Jannah would be similar in shape and height, etc. There would be no differences between them. It won't be that one person is beautiful and the other ugly or one is fair in colour and the other is black. This is one view. The other view is that they would be similar in being good mannered and the desirable and loving disposition. They will be on the highest pedestal of ethics, etiquette, politeness and morality. None of them would be immoral, discourteous or ill-tempered.
2. Everyone there would have two wives. They would either be from the houris or from the humans. The narration, which claims that every one would have seventy-two wives has a weak chain of narrators. However, in one narration of At-Tirmidhi which has been claimed to be Sahih, it is stated that a martyr would get seventy-two wives. (At-Tirmidhi, Chapter about the Superiority of Jihad). Then the saying, "One would get in the Jannah what he wants" may also be considered and so the possibility of more than two wives cannot be denied.
3. Hur is the plural of Howra It means white and pink. So it is said that one would be bewildered to see their beauty. 'Ein is the plural of 'Aina' It means one having large eyes like a deer. In another narration it is said that if any one of them just peeps towards our earth, the whole space would be filled with scent and all the space would be lighted. Her sheet of cloth used to cover the head and the bosom would be so precious that its cost would exceed this whole material earth. (Sahih Al-Bukhari, Book of Jihad, Chapter about Houri).