I love these boots.  It's a gamble with Dr. Martens because UK sizing is very different from US sizing.  I wear between an 8.5 and a 9 depending on the shoe...and I ordered the UK7. I have the leather Dr. Marten Leyton boot in a size UK6 and like the fit bettter with a thinner sock....and I should have ordered the UK6 because there is too much room in the toe.  But I am keeping them and will wear a thicker sock.  They are very comfortable with little to no breakin time.