How long is each game (in hours)?

I just beat Uncharted 4 yesterday, it was my first Uncharted experience and it was amazing. I enjoyed it so much that I went ahead and bought the Uncharted collection.

Just one thing about this game is that it's loooong. Are the other 3 just as long, or are they a bit shorter? I'm trying to estimate how long it'll take me to beat them, because it took me about 2 weeks to beat this (only played 1-2 hours a day).

Also, is playing 4 - 1 - 2 -3 a good order? I suppose I'll be a bit surprised going from 4 to 1.