A TINY dog terrier the size of a coke can is vying to be named the world's smallest dog. Little Meysi is 7cm tall, 12cm long and weighs just 150g - about the same as a hamster. The tiny dog was so small at birth that her owner mistook her for a bit of placenta and nearly threw the tiny dog in the bin before noticing it moving. The puppy, now three months old, was born 16 times lighter than the heaviest of her five siblings in Jarocin, Poland. The owners are hoping to get Meysi into the Guinness Book or World Records as the world's smallest dog because she is such a tiny dog.