Answer:
I grow up while growing down
I have a head tail but no arms and legs.
I am a king who's good at measuring stuff.
If you have me you want to share me. Once you share me you wonβt have me.
What do you get when you cross a pig with a karate expert?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.