Sock Jock Definition:
Support and protection for balls … of yarn.
Used especially by knitting and crochet athletes.
Maintains a tidy center pull ball and eliminates a
jumbled mess in the bottom of your project bag.

(2) Sock Jock sizes: for 100g Cake and 20g Mini Skein

Gauge is not crucial for this project.
Use needle size appropriate to produce a nice even stretchy fabric.

A great way to protect your precious cakes of yarn and at the same time, putting those bits and bobs of leftover fingering/sock weight yarns to good use.