Leprechauns stand between 2 and 3 feet tall, and are "highly intelligent, and will do anything to evade capture from humans," yourirish.com said. They can also live for hundreds of years, which gives them plenty of time to practice their cunning.
Have to say the highly intelligent part is questionable, but the height seems about right. Cereal box would do the job.
Lol, he will be after you with murder in his Irish heart!!