Classic trench coat shown in size XS. I'm 5' 2.5" and 110 pounds.
Note that I returned this jacket since I didn't love it on me. It's a great affordable option if it fits you well.
Update: I found a beltless version of a trench coat jacket by the same brand (Avec les filles) at TJ Maxx for the same price ($59.99). It has a hood, hidden zipper and waterproof material. It also has slight a hi-lo hem for interest. I'll share it in IG stories soon.