Every woman should have a nude colored trench for every day function or when another piece of her outfit is the main focus. But I strongly believe she should have a trench with a little pizazz that either finishes off the look or makes a statement with a monochrome base.
The signature trench coat is a fun piece to wear and always gets compliments unfortunately many plus size women forget to finish off their already polished outfit with fashionable and functional outerwear. Here are a few of my suggestions:
From Anna Scholz — The Babydoll Frill Mac (Regular $390 but on sale for $80)
From Ashley Stewart — The Belted Animal Print Trench Coat ($60)
From Carmakoma — The Grey Pelleport ($260)
From City Chic — The Spotty Trench Coat ($118)
From Igigi — The Rainy Day Trench Coat in Navy (regular $195 but on sale for $130)
Pattern is my first choice for a signature trench but it often scares people off. If you do not want to step into the illusion of full body pattern then consider an eye popping solid color or charming accent detail to make your signature trench pop out from your usual neutral look.

I agree – a trench coat is a staple piece!! I have a nude colored one and also a bright coral pink one that is tons of fun to wear out! Love that last one you featured from iGigi with the ruffle trim collar!
oooo – LOVE the gray one!!!