A grown Shih Poo usually lands somewhere around 7 to 16 pounds and 8 to 13 inches tall. The split matters: a Toy Poodle parent points to roughly 7 to 14 pounds, a Miniature Poodle parent to roughly 10 to 16. No breed standard covers this cross.
What each parent standard actually says
A Shih Poo is a Shih Tzu crossed with a Poodle. No standard covers the cross itself, so the only hard figures are the ones in the two parent standards, sourced in the table.
| Parent | What the standard gives | What it does not give | Source |
|---|---|---|---|
| Shih Tzu | Height 9 to 10½ in ideally, never under 8 nor over 11; weight 9 to 16 lb | — | Shih Tzu breed standard |
| Poodle (Toy) | Height "10 inches or under" at the shoulders | No weight, any variety | Poodle breed standard |
| Poodle (Miniature) | Height "15 inches or under, with a minimum height in excess of 10 inches" | No weight, any variety | Poodle breed standard |
Notice the gap. Only one entry contains a weight at all. The Poodle standard is written in inches and never mentions pounds, which is why published Shih Poo weight ranges differ so much from site to site.
The honest adult range, and the arithmetic behind it
Start with the only weight either standard gives: the Shih Tzu at 9 to 16 pounds. A Miniature Poodle parent stands over 10 and up to 15 inches, a taller frame than the Shih Tzu, so that side does not pull the numbers down. A Toy Poodle parent stands 10 inches or under and is a smaller dog, so that side widens the bracket downward, below where the Shih Tzu standard starts. That is where a 7-pound bottom end comes from. Height works the same way: the parents overlap around 9 to 11 inches, a Toy parent sits lower, a Miniature parent taller.
| Poodle parent | Adult weight bracket | Adult height bracket |
|---|---|---|
| Toy | About 7 to 14 lb | About 8 to 11 in (the ceiling comes from the Shih Tzu side) |
| Miniature | About 10 to 16 lb | About 9 to 13 in |
| Either, combined | About 7 to 16 lb | About 8 to 13 in |
Read those as brackets, not as a specification. They are our arithmetic on the parent figures above, and the most useful question you can ask a breeder is which Poodle variety the parent actually is. Our Poodle size chart and Shih Tzu size chart cover both parents in full.
No breed standard exists for this cross
Breed standards are written for breeds, not for crosses. "Shih Poo" is a marketplace name. No registry recognises it, no breed club publishes an ideal weight for it, and nobody publishes an age-by-age weight table for it — which is why you will not find one here. A chart claiming to know what a Shih Poo weighs at fourteen weeks was invented by somebody. For how this cross sits beside another small one, see Maltipoo vs Shih Poo.
Why muzzle length varies in this cross
This is the part worth reading twice. The parent standards describe opposite faces. The Shih Tzu standard asks for a muzzle that is "square, short, unwrinkled, with good cushioning" and, ideally, "no longer than 1 inch from tip of nose to stop." The Poodle standard asks for a muzzle that is "long, straight and fine, with slight chiseling under the eyes."
A puppy can take its face from either side. Littermates vary in muzzle length, and we will not say how much or in what proportion, because no source publishes that for this cross. All we can honestly say is that it varies.
It matters because of what a short muzzle does in a Georgia summer. VCA names the Shih Tzu among brachycephalic breeds and says the signs "are often worse in hot or humid weather." Affected dogs "are more prone to overheating, as their ability to pant and cool themselves is compromised" — and panting is how a dog sheds heat. VCA’s management advice includes "avoiding hot or humid conditions, keeping the dog in an air-conditioned area during the summer." In Lawrenceville that is most of June through September.
We will not predict where any individual puppy falls. Only a veterinarian examining the dog can assess its airway, and that is the person to ask — before you plan long August walks around it.
When a small dog finishes growing
Veterinary guidance on when dogs stop growing puts small breeds at the end of their growth around six to eight months, with full adult size by about twelve months. That is general small-dog guidance, not a Shih Poo figure, because none exists.
In between, judge condition with your hands rather than the scale: feeling the ribs and waist is the approach VCA’s body condition guidance is built on. If growth stalls or what you feel disagrees with the number, ask your veterinarian, who can compare the dog against its own record. See available puppies by breed for what is here now.
Common questions
How big does a full-grown Shih Poo get?
Roughly 7 to 16 pounds and 8 to 13 inches, as a bracket built from the Shih Tzu and Poodle standards. No standard covers the cross, so treat any single number for an adult Shih Poo with suspicion.
Does the Poodle parent change the size that much?
Yes. A Toy-parent Shih Poo brackets at about 7 to 14 pounds and a Miniature-parent one at about 10 to 16. Ask which variety the Poodle parent is before anything else about size.
Why is there no weight-by-age chart here?
Because nothing publishes age-by-age weights for a crossbreed. The Poodle standard gives no weight at all, and no breed club tracks Shih Poos. Any such chart you find was made up.
Will my Shih Poo have a short face like a Shih Tzu?
It varies between littermates, and no source predicts it. Because the Shih Tzu is a brachycephalic breed, have a veterinarian look at your individual puppy’s airway, and follow VCA’s advice about hot and humid weather and air conditioning in summer.
Come and meet a Shih Poo
Every puppy here is health-checked by our on-staff veterinarian, raised in our family home nursery, and waiting to say hello.
1848 Old Norcross Rd, Lawrenceville, GA 30044
Mon–Sat 12:00–7:00 PM • Sun 2:00–6:00 PM
