1.
Look for a trench in a bold color. As a petite woman, you have a lot more freedom with brighter, bolder hues that are going to draw attention to your small frame. Although bold patterns may be some women's worst nightmare, as a petite girl your options are pretty much endless in terms of color and pattern. Red, orange, purple--let the colors of the rainbow be your guide to finding your perfect trench.
2.
Choose a trench in a slim, fitted shape. A coat that is too large, or has fancy details like a bubbled hem or padded, studded shoulders, can overwhelm a petite frame. You don't want your tiny figure to get lost in your coat, so choose a coat that is fitted and also shorter in length, ending around hip level. You want to wear your coat, not end up having your coat wearing you.
3.
Wear your trench with a few buttons at the top undone and a belt tied snugly around your waist. This draws attention to your tiny waist and helps create more of an hourglass figure. It also creates a sort of V-neck, to elongate your figure and show off your stuff in the right way. As the saying goes, good things come in small packages, and you're going to feel uber-confident in your new, stylish trench.