I wear 7 1/2 and bought 7. They fit great but I also need a shoe I can wear thick wool socks with because I love those things, even with Uggs.
But, this works with regular Uggs... I have another pair that are more one of their other styles that I also got in a 7 (bought online through Nordstrom) but I had to take it back to the store and exchange for an 8.