Not possible for me to wear them too big. My feet are too big, so it's hard to find ones that fit, and that don't have a rough seem inside the back heel. My feet are long, and wide, and the top over the arch, which I call the bridge, is very high, so it is hard to find something that will go over my high bridge, and is wide enough, too. I no longer know what size I am in women's wear, as I was having too much trouble finding foot gear that fit. I don't like girlish styles anyway, so I get men's wear now. My men's slippers are 9/10, and my running shoes are either 10 1/2 or 11. I do have older foot gear that I don't wear any more, as they no longer fit. With some people, their feet can keep on growing. That's what happened to me. Unfortunately, I am not also growing vertically. Last time I was measured I was 5 foot and 2 inches--down from a high of 5 foot 3 1/2. Haven't been to a doc for a while, so I may have lost more since then. Osteoporosis runs in the family on both sides.
Just call me Big Foot. 
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau