I wear a 9M, US in the Saucony Women's (regular) running shoe.  Although the TR (trail) version is supposed to fit tighter in the footbed in order to handle rough terrain, I found them to be shorter as well.  They are made from a more durable (but stiffer) material, and the back rubbed my heel instantly.  I never even went for a run in them before I returned them, as they started rubbing my heel and toes while in the house.  It's too bad, but I'm just going to purchase the regular Kinavaras.