Hi guys, I've been eyeing on this jacket for a while now.
I have measured my bomber jacket and my non-raw denim jacket to try to figure out what size to get.
bomber jacket:
Shoulders - 17.5"
Length - 24.5"
Chest (P2P) - 21.5"
Waist - 21"
Opening - 16.8"
Sleeves - 24"
Sleeves opening - 4.2"
denim jacket
Shoulders - 16"
Length - 24"
Chest (P2P) - 17.5"
Waist - 16.5"
Opening - 17"
Sleeves - 24"
Sleeves opening - 4.3"
As you can see, the measurement of my bomber jacket is larger than my denim jacket. The former is a bit looser and the latter fits tighter.

The above is the measurements of this Iron Heart jacket. Should I go for S or M?
Thank you for reading my post.