After knitting the sock according to the pattern, with a very pretty heel flap, it turned out the sock was way to big in the heel and also to long for my daughters very small thin heels.
It did not fit snug and comfy at all. So I had to undo the heel and pick up the stitches again, as it fitted with the knitted gusset.
I modified the pattern and changed to a short row heels pattern. :-) It know fits better and I will be knitting an inch or so into the leg part to see how it fits.
Keeping my fingers crossed. This is my first Pixel Stitch sock, and I am very much learning as I go along. :-)