Here are some photos of pretty fabric coasters that I purchased about ten years ago from Marshall's Super Store. When I first saw them on the shelf I had no idea what they were. They looked too small to be napkins, but I did finally figure out what they are. I had never seen coasters made of just fabric before. These are made of linen and has a fancy embroidery design on the bottom of them. There were lots of them on the shelf being sold in sets of 4 and I purchased 2 sets. Each set has a different embroidery design.
There were actually on clearance because they were not selling. I think that maybe many others could not figure out that they are coasters. I wish that I had purchased more than two sets of them. They really are very pretty.
Here are some photos of other fabric coasters that I found online.