These are a sample idea of a commission I had planned - magnets!
The two big ones are the size of a half dollar - about 1 1/2 inches, while the smaller ones are not quite an inch or roughly the size of a nickel.
Each big one is a character - in this case Nisha and Vender - plus two of their accessories (a book and coffee for Nisha, a full Solo cup and a tipped-over Solo cup for Vender).
There's no magnets on the back of them yet as I don't have the magnetic strip I want yet. They are made with flat glass marbles, and Prismacolor pencils on artist's paper which was then glued to the back carefully.