This detailed and quite complex pattern is my design. Fair isle technique is necessary to create the pattern, and I do recommend twisting the yarns together at maximum of 3 stitches apart, so the loop in the back do not get too long.
These knee high socks will keep you warm and they will be noticed!

Sizes 38,39,40 and 41 included in the pattern

I used Black base, and Light blue for the pattern part. I used 2 skeins of Black, and 1 blue.