These planet glass coasters are about 4 inches wide. The glass is about .25 inches thick. They have black felt on the back. They will glide and keep your furniture pristine!
You will receive FOUR planet coasters - Mercury, Venus, Earth, and Mars.
We suggest you clean them with a damp cloth.
They would make an excellent gift for a science teacher, a scientist, an astronomer, or anybody that just loves outer space.