The tiny ball of white fluff is just 8cm tall and measures just over 20cm from his nose to his tail. While Scooter is still young, he appears to have stopped growing.
The Guinness Book of World Records title holder - a long-haired chihuahua in America named Boo Boo - is bigger at just over 10cm tall.
Scooter's size is also evident in his weight, or lack of it. He weighs less than a block of butter at 400 grams - and that is while he is wearing clothes.
Owner Cheryl McKnight, from Gisborne on the east coast of New Zealand's North Island, fashioned a regular purple sock into a jersey, which Scooter wears so he is easily seen around the house.
"Dogs have to weigh at least 870 grams before they can leave their mums for the shops, and he has not even reached halfway."
As Scooter scoots around the lounge floor, he is dwarfed by plastic toy figurines belonging to Ms McKnight's grandson.
When friends come to visit, one of the first things they say is that they want to take Scooter home with them.
Scooter was originally named Pee Wee, but Ms McKnight decided to change the name, saying she didn't want him to suffer an inferiority complex.