One of the most amazing things about the "Harry Potter" series is how consistent it was across eight movies. Most of the actors hung around, and after Alfonso Cuarón came in for "Prisoner of Azkaban" and said, "Hey, maybe let's make movies that look cool," the rest of the series looked the same, except for one detail.

The hair.

After the first two movies in the series, Harry's, Hermione's and Ron's hair changed with the times, and the overall effect is a pretty big style disparity between installments. Since no one's hair changed as drastically as Ron Weasley's, I've done the entirely unnecessary task of ranking the series by his hair.

7. "Harry Potter and the Goblet of Fire"

If I'm looking for low points for the whole series (not even just hair-related ones), this has to be on the list. I remember 2005. All of the guys in my class had longer hair. I'm not suggesting this is why shorter hair came back in style, but I am saying the trend changed right after.

6. "Harry Potter and the Chamber of Secrets"

After the first movie, Ron kept his hair mostly the same, except that it's more feathery and his part shifted over to the middle. As a society, we went through a lot to get past middle parts. This was a step backwards.

5. "Harry Potter and the Half-Blood Prince"

This is peak shower-cap Ron Weasley.

4. "Harry Potter and the Sorcerer's Stone"

The first couple movies really tried to match the characters as described in the books, so I have to give this one a pass.

3. "Harry Potter and the Order of the Phoenix"

At the very least, it's better than the "Goblet of Fire" monstrosity. This is a more natural look, without wading into the feathery territory of "Sorcerer's Stone" and "Chamber of Secrets."

2. "Harry Potter and the Deathly Hallows - Part 1 and 2"

Here we have a longer version of the "Half-Blood Prince" look, but Ron has successfully moved past the shower cap phase. And these final two movies are awesome, so it doesn't matter.

1. "Harry Potter and the Prisoner of Azkaban"

This 'do marked the first time in the series that things like styling and gel were considered for the main three, and what a world of difference it made! We said "goodbye" to Hermione's frizzy mane, and someone on set suggested, "Maybe we should do something with Ron's hair."

Agree? Disagree? Think we should rank the movies by Hagrid's hair? Let us know in the comments below.