I have been a Daniel Green customer for years.  However this particular style is not high quality as what I used to buy.

I ordered half size larger because it does run small. As for the width, it could be a little looser. I am a normal medium and do not have much of an arch so for those with big arches, I do not recommend this slipper.  Also the sole is man made just like another reviewer said. The only leather part is the top and I wonder how long this will last. When I slipped my foot, my toe was pushing through the leather. That tells me this is thin and poorly made. My old ones never showed that. Of course my previous style was more of a mule(Glamour, kidskin)  style and the  the front had more space, slightly square in the front.  I gave three stars because the quality is not great and is not all leather like it is stated in the description.