So Beautiful as a Shower Door Decal. The mermaid decals cling to any smooth glass or plastic surface. One of our personal favorites, it's as much a piece of art as a vinyl decal. It also looks awesome on sliding glass doors, windows and mirrors. Etched static cling decals are an inexpensive, easy to apply alternative to real glass etchings. Some sizes now available in a reverse pattern that highlights the mermaid on a clear background. Order yours today. You won't be disappointed.