Purple coasters are made from Reynolds Saucy, used about 8.3 grams of yarn (about 15 yards) per coaster. I made 10 coasters from the skein, and still have some yarn left. I should be able to get one or two more out of it.

Green coasters are made from some unknown mercerized cotton yarn (similar to the Reynolds Saucy).

Tan coasters are made from KnitPicks CotLin, used about 5 grams (about 12 yards) per coaster.

The pattern was well-written and easy to follow. I looked at some similar patterns (and tried doing one of them), but this was the best-written one and produced the best result.

Very quick to do - maybe 15 minutes or so per coaster.