If you want to do the same, the rings are really easy to knit and felt. You can purchase the conehead mask online by simply doing a search for "conehead".
Paton's Classic Wool - Merino
Size 10.5 circular needles
Using 2 strands of yarn at the same time, cast on 55, 73 or 91 stitches (for small, medium or large sizes). Being very careful not to twist the yarn, knit in the round in seed stitch (K1, P1) continuously until ring is approximately 2 inches tall. Bind off.
Tuck in loose ends.
For full step-by-step photographic directions on felting, look in the archives for September 17, 2004 "How to Felt a Bag"