The sheepskin is so soft and warm and my feet don't get gross and sweaty when wearing.  I'm normally a 7.5 and I have wide feet (sometimes I wear a 7 in sandals) so I opted for the 7.  After the sheepskin packed down a bit, it's actually still a bit big.  I have tightened the laces a bit and find them to still be quite comfortable, but I think I could have even gone down to a size 6.  A 6.5 probably would have been perfect but, alas, they don't come in half sizes.  I find them to look comparable to more expensive brands, but may not be quite as cute as the Uggs I've seen.