Turn your windows into a magical, mood-setting view with these realistic opaque bat window decals. These decals stick to the window purely with static cling, not adhesives, so they are movable, reusable and never fade. Note: If using these clings as a deterrent to window strikes use on the outside of the window. If using them for festive fall, indoor décor by all means put them on the inside of the windows. Comes in a package of 10 static cling bats ranging in size from 3" to 8" inches. How to Use: - Apply Window Gems to OUTSIDE of windows.- After washing window well, apply gems smooth side toward the glass.- A mist of water or swipe with a damp cloth helps them stick.- Smooth down all edges flat against the glass.- If applying in cold weather use warm water to rinse glass first.- Gems can be rinsed if they get dirty and reused as many times as you like.- They will not leave any residue on your windows. With so many birds dying every year from window collisions, we absolutely must do all we can to protect them and ensure they continue to fly safely and happily about. These bird window clings will certainly reduce window collisions and look fantastic while doing so! Made in the USA!