To find out how many pieces are in a specific Hello Kitty dinner set, you'd need to know:
* The brand: Some companies specialize in Hello Kitty products.
* The specific set name or number: Many sets have unique names or product numbers.
* Where you saw it: If you saw it in a store, you can ask an employee for details.
Let me know if you have any more information about the specific set you're curious about!