Turn your windows into a magical underwater land with these window decals. The prism effect breaks up the reflective light making your window more visible to birds, which reduces window collisions. These decals stick to the window purely with static cling, not adhesives, so they are movable, reusable and never fade. There are 10 decal in all: 1 octopus who is about 9" wide 2 garibaldi fish who are 4" and 5" long 3 seahorses that are 5", 6", and 7" long 2 jellyfish that are 3" across 2 little crabs that are 2.5" and 3" across 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. Made in the USA