Why do you need this shadowbox/paper art/diorama? Because you want to send a message about who you are and what you value. I have this diorama in my office and it sends the message, "This woman is weird." Get this for your real cat (if you have one). He/she will enjoy knocking it over. The background changes from piece to piece. The dimensions are 5" x 3" x 3/4". The length of the box is shorter than a pen. It's made of wood, paper and glue. It comes with a cardboard box with a plastic window for packaging.