Save birds from window collisions with these Sacred Geometry Mandala window clings. They break up reflections on the glass and warn birds away in time to avoid window strikes. Comes in a package of 3 1 x 7.25" diameter 1 x 5" diameter 1 x 4" diameter Window Gems stick to the window purely with static cling, not adhesives, so they are movable, reusable and never fade.  We use a prismatic vinyl which captures sunlight and turns it into rainbows all over your house.  The gems are stunning, constantly changing, and perhaps a teeny bit magical. Any light source makes the gems glow with rainbows, even moonlight. Handmade in Mount Shasta, California Instructions: Apply Window Gems to OUTSIDE of windows for best results in protecting birds. After washing window well, apply gems smooth side toward the glass. You can feel the textured side with your fingers.. this should face AWAY from the window. A little mist of water or wiping the glass down with a damp cloth helps them ...