I wear a 10 and it is hard to find shoes and sneakers that fit. I ordered a 10W (wide) and they fit well.

The leather upper is great and seems very durable. They are very comfortable and easy to walk in, especially compared to my old clunky sneakers. I will buy KEDS from now on.

I also bought the same shoe in black canvas (10W) and that sneaker fits even better. I can slip into the white leather sneakers if I'm not wearing socks, but I cannot do that with the black canvas one. So, it seems as if the leather sneaker is somewhat larger than the canvas one. I'm not sure if I would try a 10M or a 9 and 1/2W.