I just recently purchased this pink Dr. Martens and totally love it. I did inquire first if I should size up or down since I'm a 6.5 US and was advise to get the  size 5UK. First I was concern because this will be my 8th pair of Dr. Martens and all 7 pair I have are size 4UK but I read another review on a different site that she was told by the shoe repair guy that this particular style can't be stretched since it's  fabric so I opted for the 5UK. So glad I listened because I wore it the minute I open the box and didn't have to break it in. I compared it side by side with my other Dr. Martens boots which is a size smaller but you could barely tell the difference in size so I think this boots runs a bit small. I attached a picture.. The dark pink is a size 4UK and the pink waffle boots is size 5UK so I don't think I would've been able to wear the size 4UK on this particular style.