What is a good carat size for a size 4 engagement ring?

I’m going ring shopping this weekend and wanted to know what a good diamond size is for a size 4 finger. My girlfriend wants a solitaire ring with a round-cut diamond. We looked at a few already, and 1 carat seemed awfully large….she thought it looked to gaudy. I’m leaning toward .5 [...] http://bit.ly/9AmHZn