7 fast flying Swallow window clings will swoop across your window and protect real birds from window collisions. These graceful clings break up reflections on the glass and warn birds away in time to avoid window strikes. The decals stick to the window purely with static cling, not adhesives, so they are movable, reusable and never fade. Comes in a package of 7 different Swallow designs ranging in size from 5" to 7" across. Window Gems are made with a translucent prismatic vinyl which captures sunlight and turns it into sparkly rainbows. They are stunning, constantly changing, and perhaps a teeny bit magical. Any bright light source makes the gems glow with rainbows, even moonlight. Made in Mount Shasta, CA