CO the small size
Work only 2 repeats instead of 3 for the leg (fiiting)

To keep the continuity of the pattern here are the mod. I made :

left sock
I have moved the begin of the row from 10 st to the left so the travelling stitches over the purled column keep the continuity of the leg pattern and will be over next purled column.

Right sock
I don’t have work the row 26 of the last pattern repeat. So the the travelling stitches will be over the next purled column as for the leg pattern.

Decrease the gussets to 33 st for the fitting.