These shoes are much too small!  I always wear a size 9 in a boot, shoe or sandal and that is the case for the Clark's brand as well.  When they were so snug, I double checked the size on the shoe and the box they came in.  It has 9M on both.  When my daughter came home I had her try them on as a reference.  She wears a size 8 and she is age 22.  They fit her and were a bit small even for her!  So, the sizing is definitely wrong.  I also paid $62.00 for these shoes which was rather pricey through Amazon.  They made a blister on the top of my foot and I wore the thinnest socks I own to try to make them fit better.  May have to donate them to charity.  A waste of my money.