The panel is called Fractured Lattice from Barbara Walker.
The panel is made up of eight knit stitches and I used one purl stitch on each side of the panel. Total 12 stitches.
Fractured Lattice adapted for panel in sock
Row 1 and all alt rows - Knit
Row 2 - LT, k2, LT, RT
Row 4 - K1, LT, K2, RT, K1
Row 6 - RT, LT, RT, K2
Row 8 - K3, LT, K3
RT K2 tog leave on needle; insert R from front between two sts and knit first st again.
LT with RH needle from behind L, skip 1st and knit into back of 2nd st; then insert RH needle into backs of both sts (k2togtbl).