In the process, I used different yarns. One of the yarns I used was Bamboo Cotton, which is very soft and quite thick. As a result, the coasters turned out very thick and nice and small (when I altered the pattern).
I have now stopped using these smaller ones as coaster and now use them as makeup pad removers. This came about, because they were so soft I kept rubbing them against my cheek!
They wash up well, just a little pull to get them back into shape and then they look pretty in the bathroom. I have also thrown them in the dryer a few times with no issues at all.
Update: I now know that I made three changes to ZoomYummy’s pattern. So if you do decide to make these with her pattern, I can let you know what changes I made.