I have large, muscular calves and small ankles.  These boots fit very nicely in the legs and didn't look bunchy and awkward.  Normally wear a size 8 in keen shoes.  This 8 boot was too tight.  The 8.5 was too large.  I ended up returning both. I advise trying these on in the store before purchasing them online to save you the hassle.  Amazon was cool about returning them without charging a restocking/shipping fee because they were not true to size.