Christians differ in their beliefs about Jesus' conception and life:
Conservative Christians generally believe in the inerrancy of the Bible. They accept the statements in the Gospels of Matthew and Luke that Mary was a virgin when Jesus was conceived. That is, Jesus' conception did not involve male sperm, This would imply that God either:
Created an living embryo with a unique human DNA in one of Mary's fallopian tubes.
Created special DNA which fertilized an ovum produced by Mary's body.
Thus, Jesus would have had DNA that was either 50% or 100% created uniquely by God. If so, then Jesus could have had any height, hair color, eye color, skin hue, style of nose, etc. He may or may not have resembled a typical Palestinian from 1st Century CE.
Most liberal Christians assume that the virgin birth stories in the Christian Scriptures (New Testament) are myths, and that Jesus was conceived as a result of normal sexual intercourse between a man and woman -- probably by Mary and Joseph. Thus, they would expect Jesus to have resembled a typical male of that era.
In his Popular Mechanics article, Mike Fillon argues that Jesus height, weight and facial features were probably close to the left portrait above. He wrote: "In North America he is most often depicted as being taller than his disciples, lean, with long, flowing, light brown hair, fair skin and light-colored eyes. Familiar though this image may be, it is inherently flawed. A person with these features and physical bearing would have looked very different from everyone else in the region where Jesus lived and ministered. Surely the authors of the Bible would have mentioned so stark a contrast. On the contrary, according to the Gospel of Matthew, when Jesus was arrested in the garden of Gethsemane before the Crucifixion, Judas Iscariot had to indicate to the soldiers whom Jesus was because they could not tell him apart from his disciples."