The only physical description of Jesus that does exist is from a copy of a letter from the Roman consul Lentulus to the Roman Emperor Tiberius. This document was discovered in a Monastery with copies of other ancient documents. According to the copy of the letter, the original letter from the consul was dated to the 12 year of the reign of the Emperor Tiberius. Scholars have historical verification that a certain Roman consul named Lentulus was in Judea at the time of Jesus’ trial and crucifixion. His influential family is mentioned by the Jewish historian Josephus in his book Antiquities of the Jews.
The only clue we have from the gospels is that Jesus dressed or looked Jewish enough for the woman at the well to recognize he was Jewish. That is enough for me as far as appearance goes. Beyond that his time on earth was surrounded by the culture he was inserted into. All the depictions of Jesus since are projections of the culture or artist who created them.