Creative Ropecraft' has instructions for a Star Grommet, which is derived from the Drummer Boy's Plait.
I tied the Drummer Boy's Plait(monkey braid/chain sinnet), then wrapped that around a 2 liter bottle cap, joined the ends, doubled the knot, and tightened it to finish.
I may try using it like a finger loop paracord lanyard. In smaller diameter cord, I think it looks nice enough to wear as a pendant...
The lanyard/fob example is shown with a Kershaw Nerve pocket knife.