One skein of Lamb’s Pride will normally yield 5 or 6 coasters, other worsted weight wool yarns can be used, but may felt differently and produce a different size.

Edit: March 14th 2012 (Happy Pie Day)

I have added an extra repeat of the increase rows to make an optional larger coaster as many were finding the coasters a little small. The small is 4.5” and the large is 5” across.