Can make large by increasing pattern repeat of 15 stitches.
For medium go to 2.50mm. needles
For large I used 2.75.
I used all of my socks with Hawthorne yarn.
Written pattern.
For Stroll yarn would need 2 - 50gr balls.

Correction: you will do gusset decreases until you have 14-33-13 stitches remaining for ladies size 9.