I found a cool designer felt coaster by zigzign a Danish company and thought I could make one.
No offence but I think mine came out a little better.
Although this took some time the end result was worth it (just watch your fingers on the felting needles - be warned, they are very sharp!)
Step 1: The Equipment
Step 2: Getting Started
You will need about 5 sheets of felt cut into strips for each coaster (6 inch by 6 inch sheets). A steel ruler and scalpel are really useful here to ensure even sized strips.
Step 3: Growing the Spirals
To build up the pattern make folds and rolls of the felt to create trunk-like knots these are difficult to incorporate but worthwhile to give a less uniform design.
Step 4: Support
Step 5: Finishing Off
I was very pleased with the finished coaster. I'm sure there are easier ways to produce these, such as making a roll and slicing sections but I didn't want to buy large amounts of felt since I wasn't sure how successful I would be, and I'm not sure the best way to cut slices without fuzzing the design.