This is a really cool decal. You can use it to decorate your laptop, notebook, water bottle, or car window. They also look pretty cool on mirrors. Find a smooth surface and put it there! Now you're getting fancy!
Decals are (generally)removable but not reusable, though not recommended for fragile surfaces. Vinyl is waterproof and suitable for indoor or outdoor use.
Decal sizes vary from star to planet, between 2.7"x2.5" to .66"x.75", 19 stellar pieces altogether. Example images are not exact for size.