Do you have left overs from making the felted sweater wreath? If so, skip the "Felting Instructions" and go right to "Coaster Instructions."
Rotary Cutter, Guide and Mat (or Scissors)
Throw your sweater in your washer along with a tiny bit of mild soap. Set your washer to the hottest water setting. Throw in dryer balls, tennis balls, an old pair of shoes, or an old pair of jeans... anything to create agitation. Let your washer do the work! Stay close during this process to check on the progress of your sweater. Sometimes the process will take 10 minutes and sometimes it will take 30 minutes (just keep sending your sweater through until the fibers felt together.) Even though your felting should be complete just from the washer alone - you can send your sweater through the dryer so you can get going on this project sooner.
Cut 4" x 4" squares from your sweater where there are no seams. If there is a pattern in the sweater and you would like your coasters to match, try to cut your squares where the pattern repeats. That is it! Easy schmeasy!