These are very nice slippers. The wool is thick and warm. Sizing seems to be a big issue with slippers. I've run into this issue before and was disappointed when I ordered one size larger to account for all the reports. I ordered my standard size (10) in these slippers. They are a tiny bit short, but have stretched enough to be comfortable and not feel small. If your standard size typically runs a little small on your feet, then size up. But, if you typically can fit into shoes of your size, stay with the same size in these slippers. My only complaint is that they're a little lose about the middle of my foot. I'd like the center of the slipper a little narrower. But, my feet are shaped a little odd. My brother says they're shaped the same as the inside of my mouth, but I think he may be exaggerating.