They are a little big. I wear 6.5.  But it wasn't enough to return them because these are the type of shoes/boots that socks are perfect for.  I wear socks.  The look, color, hip factor and outside versus inside zipper make these a fun bootie and are comfortable to walk in.  I got around SLC and Boise for a week and no issues.  They are snow proof and don't stain. I recommend this bootie.