As mentioned in the "Chritmas Mitts" post, I made a "Cropped Topper" (original design name) from Vogue Knitting. I used the recommended yarn, as it is what drew me to the vest in the first place.
I have a pin holding the lower fronts together for the photos. I may wear it with a scarf pin. The stitches are loose enough, a small button is also an option...