making a baby bib from a towel

I used to have some bibs that had been made from hand towels. They had a circle cut in the middle, with ribbing over it, and one shoulder was split and had velcro so you did not have to pull it over the head when it was full of food.

The ones I had were store bought, but I can not find any like that now. Has anyone made them? I am sure I can figure out how to put it together, but I don't know how big to make the circle.