Amazing boots BUT... I should have listened to the other reviewers when they said they run small. I have another pair of boots by Dream Pairs, in a size 10 (my normal size), and they fit so perfectly/comfortably. So when I ordered, and when the Amazon suggestion said "We recommend a size US WOMEN 10"... I ordered my usual size 10. They were too small. They fit around my foot snugly (and I'm pretty narrow in the heel and about average to slightly wide around my upper foot/toes) and the biggest issue was they were too short. My toes pressed painfully against the end of the boot... even without a sock. I sent them back (simple and fast exchange) for a size 11. There's not a "size" difference as expected. It's more of a "half size" difference between the 10 and 11 (see pictures). They will fit, but I could easily (and more comfortably) have gone with an 11.5 IF only a half size was offered. I think that would have given an even roomier fit that would have allowed for a thick sock. The good news is-- they are SUPER warm and fuzzy all the way from toe to top... so a thick sock won't be needed anyway. I thought about ordering a 12, but they would likely be too big and since I don't need to make room for big thick socks or multiple pairs of socks, I'm going to keep the 11's and hope they will stretch out a bit with wear to give me just a tad more room. Also, I wasn't as happy with the color I picked when I ordered the 10 (chestnut). It was just a bit darker and had more of a "red-brown" color than I had in mind. On my monitor they weren't as rich of a color or as deep. So, when I reordered I got the sand-classic color instead. I do like it better. Both colors are very nice, but I just prefer the sand. The style I ordered is the "Shorty" which looks just like uggs- but so much better value price-wise. I never thought I'd want "ugg" looking boots, personally they just seem clunky and ugly- but these looked so warm, cozy, and just perfect for slipping on with leggings and a baggy sweatshirt when you're in a rush to run simple errands. They are indeed perfect for "casual-lazy-don't-care" days. They seem well constructed and since my other Dream Pairs boots (which I LOVE so much: https://www.amazon.com/dp/B01GAIEXRG/ref=twister_B00H7KSKR6 and if you grab these beauties they ARE true to size!) have held up beautifully, I expect these will too. IF they fit just a bit larger I'd probably grab a pair in black too, but I'm going to see how much they give with wear before I do that. When you order, go ahead and order the size up. They do indeed run small. If you have a long narrow foot you need a size up for sure. If you have a VERY wide foot you might even consider two sizes up... or another style/brand. They do seem to run narrow as long as short. I have big calves but skinny ankles. As you can see in the photo they  fit my skinny ankles without a lot of room to spare. Note: The darker chestnut color is the size 10 and the sand color is the 11... again... more like a half-size difference than a full size difference. Hope that helps you pick your perfect size. ;)