Watched Looper, dug Young Joe's work jacket, read all the posts here, then went and bought the thing.
Members have said it doesn't fit normally. I've found this is quite true, so I registered to try to help anyone ordering one blind on Amazon.
Here's the prop:
Now, I am probably Joseph Gordon-Levitt's height, but I'd set my weight at about 1.5 JG-Ls. I tried a medium, and while the cut looked similar to how he wears it, it was simply ridiculous when I would move at all (the waist would ride way up). Felt rather tight in the shoulders, as well. So, I tried a large. Again, felt right in all places but the waist. Narrow around and still rode a bit high. I grabbed an XL, and this solved the waist issues, but now it feels a bit big in the chest and the arms are a bit long.
Here's the thing: if you're going for cosplay, get it a size smaller than you would a normal jacket. But, if you're wearing it every day, get your typical size.
That being said, the jacket I bought off the rack ($79) looks exactly like the prop (or will, once I cut off the Carhartt logo). It's warm, feels comfortable (if a bit stiff; needs to be broken in), and will last me several years. I know most guys here are looking for a screen-perfect image, but honestly, get it in your normal size and look badass EVERY day.
My measurements, for reference:
Height: 5'10"
Weight: 220 lbs
Coat size: 44R
Overarm: 53"
Chest: 43"
Waist: 37"
Hip: 43"
Sleeve: 35"
Arms outstretched in front of me, the sleeves end at mid-wrist. At my sides, they come to mid-thumb. Pulling the jacket away from my waist, and there's about 8 inches of room. Comfortable, but not screen correct. If I wanted to pull off Young Joe, with my measurements, I'd go with a large, for sure.