I even debated wearing plaid tights (a much smaller plaid) but thought that might look a bit crazy... at least for my office.
Cardigan: Field of Flowers from Anthropologie
Shoes: Chanel Fall 2008 via Ebay
I think I need to get a detail shot of this cardian because it has some great elements. Big carved buttons that are actually snaps and ribbon cut ends to the heathered grey trim. I've had this for about 5+ years now. That is one of the good things about the pieces from Anthropologie. They're so unique yet classic. Sadly they are typically pricey too unless you get them marked down on sale, which is what I usually wait for.