These molds make 2 dinosaurs. They are 9x13mm and 2mm deep.
These molds are so easy to use. You do not need a releasing agent to pop out your pieces although they will last longer if you use a release agent.
If you are working with polymer clay, you can bake your clay right in the mold, this will allow you to release the molds without distorting the image.
To clean the molds you can wash them with soapy water.