"Crime Scene" magnets
Available as single magnets, or as a set of 4.
They are all handcrafted individually, so no two are exactly alike.
Magnets range slightly from 1.5-1.75" in diameter, and are backed with a suuuuper strong ceramic magnet.
There are extremely durable -- made from polymer clay, finished with a gloss coating, and should withstand just about any impact (within reason).