It's getting cold out there!

I am despondent thinking about the long months ahead wearing the cardi+top+skinnies+boots formula, every day on end. I really like wearing blazers instead of cardis, because of the extra structure it provides. And also because I am just not keen on the "new" cardi shapes that are out there.

Got me thinking tonight (as I shivered) that I really need a winter coat that can fit easily over a blazer!!! Then I could get more use out of my blazers, and not get so bored wearing cardigans all winter long, day after day....

Any suggestions for this? Remembering that I am petite. Particular styles/cuts I should look for? Should I just size up? Hints and tips?

I do have one stylish, 3/4 length, Tahari black puffer that goes easily over any blazer (no matter how bulky). But, it's really not that warm, and it's black. My Jcrew coat will fit over thin blazers, but I worry about buttons on the sleeve (and in the case of my moto jacket, zippers) ripping out the lining.

Show me your winter coats that accommodate blazers underneath!