17.5" Shoulder
18" Chest
20" Length
19.5" Sleeve

It appears to be a jacket cut down from a 1940s U.S. Army coverall.
Completely worn out, but clearly intentional—darts added in the back show it was thoughtfully reworked, not just destroyed.
The I LOVE NY pin on the chest seals it.
A true one-of-a-kind piece.