Traditionally, a tall, fat man is chosen to fulfill the role because the original King Momo was of that physical stature.
In Argentina and Uruguay, Rey Momo is more often represented by a big, sometimes monumental, doll made of papier-mâché over a wooden or wire structure.
In these cases it is carried in a tow or at the top of a truck, and presides the carnival with a royal court of dancers.
While a doll, it conserves its traditional features: flamboyant and colorful clothing, a smiling or joyful face and a prominent belly.
Also in the former Portuguese-ruled Goa, India, at the Carnival Parade, a person is selected to play the part of King Momo.