Shih Tzu are classified in the toy group in most countries, with a height of eight to 11 inches and weight of nine to 16 pounds (four to seven kilograms). As with most toy breeds, shih tzu are quick to mature, reaching adult size by about 10 months.

Do Shih Tzus grow big?

Shih Tzus generally grow up to about 9 to 16 pounds (4kg – 7kg) for both male and female dogs. Both male and female Shih Tzus can grow to an average shoulder height of 8 to 11 inches or about 20 to 28 centimeters.

Why is my Shih Tzu so big?

It is not uncommon for an owner to have a large Shih Tzu and be really taken by surprise because both dam and sire where smaller dogs. This can happen because size is a genetic trait that can be passed down up to 5 generations back.