This is a very simple pattern worked in the round.

The yarn I have used is discontinued, but any dk weight cotton/mix would work just as well.

If you wanted the coaster larger, then you could use a larger hook.

A double magic loop/adjustable ring is executed in the same way as a standard magic loop/adjustable ring, you just loop the yarn around your fingers twice instead of once.

Here is a video tutorial for a “standing sc”:
https://www.youtube.com/watch?v=8MsVeIId2UY

Please feel free to message me if you have any problems :)

Enjoy!!