This sock is a very cozy and thick sock, so it fits M to L sizes of feet.
It is done in 1x1 ribbing for leg and foot, and has an afterthought heel.

Techniques involved: stretchy cast-on, knitting in the round or magic loop, Ribbing, decreases, afterthought heel, Kitchener stitch or 3 needle bind off.

Needle Size: US 11
Yarn: Yarn used here is Crystal Palace Chunky Mochi (150g/3 balls if using 1 colourway, 4 if using 2 colourways (you will have a little left over of each colour).
You can use any similar weight chunky yarn (that calls for Gauge 11.0 to 13.0 sts = 4 inches).