So I pulled out the Great Pink Mitten (TM) and started again. Thank you, Hazel, for that clarification. I have a pair of 3-1/2s that I am using and this pair looks like it will fit better. It will fit a child anyway, and my guage has worked out properly.
Let me tell you – these mittens are a whole lot more exciting to knit than that boring old afghan I am working on. Perhaps it is the variation in the pattern. And it is wayyyyyy less daunting of a task.