Coasters cannot be much easier than this to make. I used some Christmas plaid print and felt.
The plaid actually has a little gold thread running through but it shows in the photo as a tan color.
To make these, decide what size you want to make them and use something round, such as another coaster to draw your circle pattern on card stock. Cut it out and you have your pattern. I used a thin line felt marker and cut the circle just inside the marker line with pinking shears.
For each coaster, cut one circle from the Christmas fabric and one circle from felt. Use co-ordinating or matching thread and hand stitch them together. I added a small button but you could leave them plain or add any other little festive decoration you like. Just add it where your stitch ends and close enough to the edge so it will not interfere with sitting your cup or glass on the coaster. Click on photos to enlarge.
Front and Back:
Set of 6 coasters: