I wear a womenswear perfect size 8. Ordered that. Too long in back by about a thumbs width. Ordered next size down and they were exactly the same on the cardboard and on my foot.They are comfy, the silicone sticks, but the back piles up in any shoe b/c too long. Also, secondary, I’m not a fan of the over the bunion seam. It’s soft, but still irritated a little. They are stretchy for sure. Feel a little like tights/pantyhose material but a little thicker than pantyhose and a little less weight inSee full review