Algae Bloom. *IMPERFECT. Sometimes imperfections happen. Chips in the paint, cloudy or bubbles in the resin, etc. These are imperfect pieces but still need a good home. Ceramic tile coaster set of 6. Size: 4.25 x 4.25 (inch). Colors, white background, green, purple, teal. Backed with cork backing to protect surfaces. Resin sealed for added protection against hot qnd cold cups, mugs and glasses.  Ready to ship.