It looks as though the crosses start at the ankle with different colours - blue on the left ankle red on the right. Maybe one is just pulled up harder than the other.
I tend to make plain hose these days, but I know how much goes into making patterned ones.

It can become a bit of an obsession - I have numerous pairs around the house and at one time always had some socks being made. I probably have more pairs than I could ever wear out, but it is so good to be able to pull on a pair and feel the chill of the morning pushed back. We can't afford to have the heating on like we used to, so the woollies have to be deployed when the storms come sweeping in off the sea.

Anne the Pleater