Shih Tzus are one of the most charming small dog breeds in the world. Known for their affectionate temperament, royal history, and long flowing coats, these dogs also have a unique size profile that makes them perfect companions for both small apartments and large homes.
But when it comes to size, many owners and potential buyers ask: How big do Shih Tzus really get? Do males grow larger than females? What about Imperial or Teacup Shih Tzus?
This complete guide answers every size-related question about the Shih Tzu—from puppyhood to adulthood—backed by growth charts, veterinary insights, and 2025 updates that most websites don’t cover.
📏 Shih Tzu Size Overview (Quick Facts)
- Adult Height: 9–10.5 inches (at the shoulder)
- Adult Weight (Standard): 9–16 lbs
- Adult Weight (Imperial/Teacup): 4–8 lbs (not officially recognized)
- Growth Period: Fully grown by 10–12 months
- Body Build: Compact, sturdy, and square with a short muzzle
- AKC Standard: No more than 16 lbs, not less than 9 lbs
🐾 Shih Tzu Puppy Growth Chart (Month by Month)
Shih Tzu puppies grow rapidly in their first year. Knowing what to expect helps owners ensure their dog is developing normally.
| Age | Average Weight | Height Range | Growth Notes |
|---|---|---|---|
| 8 Weeks | 2–4 lbs | 4–5 inches | Still very fragile, rapid growth ahead |
| 3 Months | 4–7 lbs | 6–7 inches | Puppy coat thickens |
| 6 Months | 7–12 lbs | 8–9 inches | Growth slows, body fills out |
| 9 Months | 9–14 lbs | 9–10 inches | Close to adult size |
| 12 Months | 9–16 lbs | 9–10.5 inches | Full adult height, weight stabilizes |
📌 2025 Veterinary Update: New research confirms that Shih Tzus reach 95% of their adult size by 9 months, earlier than many other toy breeds.
🐶 Male vs. Female Shih Tzu Size
While differences are subtle, they exist:
- Male Shih Tzus: Usually a little heavier, averaging 12–16 lbs.
- Female Shih Tzus: Slightly lighter, averaging 9–14 lbs.
- Temperament factor: Males may look stockier, while females appear daintier.
🏆 Standard vs. Imperial (Teacup) Shih Tzu Size
There’s a lot of confusion around Shih Tzu size categories.
- Standard Shih Tzu (recognized by AKC, CKC, FCI):
- 9–16 lbs, 9–10.5 inches tall.
- The only officially recognized size.
- Imperial / Teacup Shih Tzu (unofficial, but popular in 2025):
- 4–8 lbs, under 9 inches tall.
- Bred selectively for smaller size.
- Not accepted in official breed standards due to health risks.
📌 Buyer Warning: Imperial Shih Tzus may be prone to more health problems (fragile bones, low blood sugar, breathing issues). Always verify ethical breeding practices.
🐕 Body Structure & Proportions
Shih Tzus may be small, but they are solid and sturdy.
- Head: Broad and round with a short muzzle (brachycephalic).
- Body: Compact, slightly longer than tall, square build.
- Tail: High-set and curls over the back, adding to their overall size impression.
- Legs: Short but strong, giving them a solid stance.
This makes Shih Tzus look slightly larger than they are—especially with their long, fluffy coat.
🧬 Factors Influencing Shih Tzu Size
- Genetics: Parent size is the best predictor of adult size.
- Nutrition: Poor diet may stunt growth; balanced puppy food supports proper development.
- Exercise: Limited exercise won’t affect height but can affect muscle tone.
- Spaying/Neutering: Can slightly impact growth plates if done too early.
- Health Conditions: Hypothyroidism or growth disorders may affect size.
⚖️ Ideal Weight & Body Condition
Maintaining the correct size is about weight balance, not just height.
- Healthy: You should feel ribs easily but not see them.
- Overweight: Round belly, difficulty moving, heavy breathing.
- Underweight: Visible ribs, low energy, fragile body.
📌 Shih Tzu Health Insight 2025: Obesity is the #1 preventable issue in Shih Tzus. Even just 2 extra pounds can increase breathing difficulties due to their short snouts.
🏡 Lifestyle & Size Considerations
- Apartment Living: Their small size makes them perfect for small homes.
- Travel: Most airlines classify Shih Tzus as “cabin-sized pets” if under 15 lbs.
- Crates & Beds:
- Crate size: 24″ length (ideal for adult Shih Tzus).
- Bed: Small dog size (18–24 inches).
- Carriers: Airline-approved soft carriers (16–18″) are best.
📊 Shih Tzu Size vs. Other Small Breeds
| Breed | Height | Weight | Comparison |
|---|---|---|---|
| Shih Tzu | 9–10.5 in | 9–16 lbs | Sturdier than Maltese/Yorkie |
| Maltese | 8–10 in | 7–9 lbs | Lighter, more delicate |
| Yorkshire Terrier | 7–8 in | 4–7 lbs | Much smaller frame |
| Pekingese | 6–9 in | 8–14 lbs | Similar sturdiness, shorter body |
| Pug | 10–13 in | 14–18 lbs | Taller and heavier |
❓ FAQs About Shih Tzu Size
Q: What age is a Shih Tzu fully grown?
A: By 10–12 months, most are fully grown.
Q: Do males grow larger than females?
A: Yes, but usually by just 1–2 lbs.
Q: What’s the difference between Imperial and Standard Shih Tzus?
A: Imperial Shih Tzus are smaller (4–8 lbs), but not recognized by kennel clubs.
Q: Can diet affect my Shih Tzu’s size?
A: Diet won’t change height, but poor nutrition can cause stunted weight or bone issues.
Q: Does smaller size mean longer lifespan?
A: Generally yes—smaller Shih Tzus may live up to 16–18 years compared to larger ones averaging 12–15 years.
📝 Final Thoughts
The Shih Tzu’s size is one of its most attractive qualities. Small but sturdy, these dogs are the perfect blend of elegance and durability.
- Standard Shih Tzus range between 9–16 lbs and 9–10.5 inches tall.
- They are compact, strong, and perfectly suited for both apartments and larger homes.
