Is it okay for a Christian to wear a Kippah?

Answer:

A kippah is a small skullcap that is worn by many Jewish men during prayers, though Orthodox men will tend to wear them all day. "Wearing a kippah is not a religious commandment. Rather, it is a Jewish custom that over time has come to be associated with Jewish identity and showing respect for God" [Judaism.About.com].

But Christianity is distinct from Judaism.

"Now I praise you, brethren, that you remember me in all things and keep the traditions just as I delivered them to you. But I want you to know that the head of every man is Christ, the head of woman is man, and the head of Christ is God. Every man praying or prophesying, having his head covered, dishonors his head" (I Corinthians 11:2-4).

When men commonly wore hats, the tradition was that a man removed his hat when he entered a home, was introduced to someone—especially someone important —or wished to pay respect to someone, such as at a funeral. That tradition came from Christianity, but it has been lost in recent years, as it is no longer fashionable to wear hats. But regardless of fashion, the point remains. For Christians, baring the head shows respect for someone greater, and in prayer, it shows respect for God.