I wear a size 7 1/2-8 in most shoes and a size 7 in Uggs....I have these in a US w/f (women's) size  8 and they fit perfectly.  I would say they run true to size as long as you are looking at the right size chart on the box.... There are "second rate" Emus out there with an Emu tag and everything but are NOT authentic premium shearling Emus and they do run a size large as they do not have the ultra thick shearling inside....be careful what you buy!  I have found them both online recently.  Great boot-better than Ugg prices that's for certain and way cuter too!