20 Christmas Tree Swirls w/ Star Water Slide Nail Art Decals. NEW set of 20 Swirl Christmas Trees Water Slide Nail Decals. 10 each of 2 different designs! Sets include: 20 decals that are easy to apply.Because of the preparation process of the design on a transparent background, they will always look best over clear or a light nail polish to get the full effect of all of the colors. | eBay!