Shih Tzu Sizes

Typically, a fully grown standard size Shih Tzu stands at 8 to 11 inches at the withers and weighs between 9 and 16 pounds.

Indeed, as the average Shih Tzu size is 9 to 16 pounds, some pups are naturally bigger, some smaller. This usually depends on their genetics, breeding, nutrition and training. 

Imperial Shih Tzu size is usually smaller than a standard Shih Tzu, weighing around 4-9 pounds.

Like all other dog breeds, Shih Tzus go through rapid growth phases before turning 12 months old. They usually reach their adult size around the age of 10 to 12 months. Although, some pups finish growing at 9 months, some at 15 months of age.

Zooming in on the first 12 months of your Shih Tzu’s life, these are the puppy phases of Shih Tzu puppies:

• Newborn – from birth to 3 weeks old
• Young Puppy – 4 weeks to 4 months old
• Older puppy – 5 to 11 months of age

Naturally, your Shih Tzu puppy will have the most rapid growth rate from birth until around 6 months of age. After that, the growth rate will slow down and will usually plateau when they’re about 10 to 12 months old. 

Shih Tzus are generally considered as small or even toy dogs. Their small size makes them perfect for people who live in apartments or don’t have the luxury of a huge backyard. Shih Tzus are the perfect companions and love spending their time in their owner’s lap.