just got first pair of Whites Boots size 8.5 EE... i have about a half inch room in toe box, my heel slips a slight amount, and the heel is already sore from just a few minutes of wearing... should i go down a half size? I'm use to thorogoods which are

33 35

41 31

22 30

23 32

17 30

3 0

9 30

38 33

30 31

4 30

24 32

12 0

16 34

12 31

11 0

8 0