This is a much debated question. You may say why is this important? Bring up the subject of hair length and watch the fireworks! Now as to the argument that Jesus had long hair I am amazed at the shallowness of the arguments. Call yourself a Doctor of Divinity and you can make the most outrageous statements and have people just nod their heads and accept it as truth. Jesus was a Nazarite. No he was a Nazarene. They didn’t have anything to cut hair with in those days. Then how did they shear their sheep? Remember that barbers are mentioned in the Bible, one even cutting Samson’s hair. The razor is also mentioned. Look at Roman statues, the men have short hair. Now the Israelites did not leave images of themselves and over the thousands of years of history hairstyles change and the Jew, like all mankind, did not always obey God in this matter. So let’s go to the Scripture and see what it says. Leviticus 19:26-28 Ye shall not eat any thing with the blood: neither shall ye use enchantment, nor observe times. Ye shall not round the corners of your heads, neither shalt thou mar the corners of thy beard. Ye shall not make any cuttings in your flesh for the dead, nor print any marks upon you: I am the LORD. Some use this to prove the Jews were required to have long hair but the context says otherwise. It is to forbid pagan practice that these commands are given. One such practice is the tonsure, another is certain shavings of the beard. Note also about cutting and tattoos, which are so popular now. But this passage is not explicit so we need more light. Leviticus 21:5 Theyshall not make baldness upon their head, neither shall they shave off the corner of the their beard, nor make any cuttings in their flesh. This shows a shaving of patterns, not trimming of hair. But more clarification is found in Ezekiel 44:20 Neither shall they shave their heads, nor suffer their locks to grow long; they shall only poll their heads. The poll is the top part and back of the head so this is a standard male haircut. Now let’s look at I Corinthians 11:13-16 Judge in yourselves: is it comely that a woman pray unto God uncovered? Doth not even nature itself teach you, that if a man have long hair, it is a shame for him? But if a woman have long hair, it is a glory to her: for her hair is given to her for a covering. But if any man seem contentious, we have no such custom, neither the churches of God. So yes men are to have short hair, women long hair, a man should remove his hat in church and a woman should have a hat or other covering in church. If you don’t like it don’t do it but don’t think that it pleases God. Just like a son of age may visit his Dad with long hair but he knows Dad is still displeased. Still not convinced? Look at Revelation 9:7-8 And the shapes of the locusts were like horses prepared unto battle; and on their heads were as it were crowns like gold, and their faces were as the faces of men. And they had hair as the hair of women, and their teeth were as the teeth of lions. A hippie! Bearded faces and long hair! In Deuteronomy 22:5 God doesn’t even want men and women to wear the same kind of clothes! Vive la difference! And as to the Nazarite commands, that is a topic for another study.