This is NOT the Chinese symbol for happiness!!!
It is a joke design - look at the fake Chinese character!
CHINESE SYMBOL "HAPPINESS" CONCRETE / PLASTER MOULD
This mold is made from thick ABS plastic and you'll be able to use it over and over again.
You could use this to make small stepping stones (see diameter below) or to use as garden stone decorations or wall plaques. If you want to make plaques for indoors then you can use this mould for plaster casting instead.
Each of the stones you make from this mold will have a diameter of just over 9" (23cm) and they will be approx. 1¼" (32mm) deep.