My office is usually on the chilly side no matter the season, and this is a great piece to wear with my business-casual clothes. It also goes great with jeans, and I wear it to church as as extra layer in case it's chilly in service too. Basically this jacket works for everything!
For the record, I'm 5' 5" and currently about 160 lbs, so I ordered the L. It's very flattering and goes well with all of my clothes and accessories. :)