Authentic Burberry boots run a little large in order to accomodate thicker socks.  They only come in whole sizes, so if you are between sizes, I recommend ordering up or down based on what you're planning to wear under them (tights vs. thick socks).

The measurements below are from the bottom of the sole.  Width measured across the widest part of the foot.  Length is from tip of the middle toe to heel.  Height is from the top of the boot to the bottom and includes a 13.5 cm heel (for the 12.75 cm London Check style heel, please subtract appropriately).

Size          Width           Length            Height

6 (36)        8.5               24.5              34

7 (37)        8.75             24.75            34.25

8 (38)        9                  25                 35

9 (39)        9.5               25.25            35

10 (40)      9.75             26                35

11 (41)      10                26.75           35