Get the look for less with this gorgeous oxblood puffer coat by Mossimo, just $55 at target.com. I tried this coat on in person yesterday and loved it (see my Instagram profile for a pic).
The size small fit perfectly over a chunky sweater, and the sleeves are actually long enough for us taller girls! This coat looks more expensive than it is. I can't vouch for the warmth factor but I think it would be fine for temps above 30F (maybe even chillier depending on your comfort level). Also available in blue, gray or black.