Size Chart: How Big Will a Cavachon Get?

Most Cavachons finish between 13 and 20 pounds and stand about 10 to 13 inches at the shoulder. And here is the genuinely useful part: the Cavachon is one of the easier crosses to estimate, because both parent breeds are close to the same size to begin with.

That is not true of most designer crosses. Plenty of them pair parents whose adult weights barely overlap, which is why the predicted ranges you see for them are so wide they stop being helpful. The Cavachon does not have that problem.

Before the numbers, the same honest caveat we give on every one of these pages. The Cavachon is a Cavalier King Charles Spaniel crossed with a Bichon Frise. It is a crossbreed. There is no breed club, no registry standard, and no published Cavachon standard — anything presented as one was invented by whoever wrote it. The ranges below are reasoned from the two parent breeds, which are recognized and do have real published figures. Nobody can guarantee an adult weight for a crossbreed puppy.

Where the size range comes from

Look at the weight column. The Cavalier standard says 13 to 18 pounds. The Bichon commonly runs 12 to 18. Those two ranges sit almost on top of each other.

This is why the Cavachon behaves the way it does. When both parents are drawn from roughly the same weight band, the puppies land in roughly that same band no matter which parent they favor. There is no tall parent and short parent pulling in opposite directions.

The height column is where the small difference lives. The Cavalier is a slightly leggier dog — 12 to 13 inches — while the Bichon is compact at 9.5 to 11.5. So a Cavachon that takes after the Cavalier side tends to be a touch taller and longer in the leg and ear, and one that takes after the Bichon side tends to be a little shorter and rounder. The weight barely moves either way.

Expected adult size

• Weight: roughly 13 to 20 pounds, with most landing between 15 and 18
• Height: roughly 10 to 13 inches at the shoulder

Why there is no weight-by-age chart here

Nothing credible publishes age-by-age weights for a crossbreed. No registry recognises this cross, no breed club tracks it, and the two parent standards describe adult dogs rather than puppies. Any chart claiming to know what one weighs at fourteen weeks was invented by somebody. What we can give you is the adult bracket above, drawn from the parent standards, and the growth timeline below.

Generation: F1, F1b, and what it actually changes

You will see Cavachons described as F1 or F1b. Here is what those mean, and here is the part most listings skip.

• F1 is a first cross: one purebred Cavalier parent, one purebred Bichon parent.
• F1b is a Cavachon bred back to one of the parent breeds, almost always the Bichon.

In this particular cross, generation changes coat far more than it changes size. A Cavalier’s coat is silky, straight to slightly wavy, and it sheds. A Bichon’s coat is curly, dense, double-layered, and sheds less but mats readily and needs regular professional grooming. An F1 Cavachon can land anywhere between those two. An F1b, with more Bichon behind it, leans curlier and more Bichon-like in coat and grooming demands.

Two things to be clear about. First, no dog is hypoallergenic — not the Bichon, not the Cavachon, no matter the generation. Anyone selling a coat type as an allergy solution is overselling it. Second, because both parent breeds sit in the same weight band, going F1b does not meaningfully shrink the dog. It changes what you will be brushing.

We offer grooming here, and it is worth planning for with either coat type.

What affects adult size

• The two specific parents. The strongest signal by far. A Cavalier at 18 pounds bred to a Bichon at 17 gives you bigger puppies than two parents at the bottom of their ranges. Ask about the sire and dam, not about the cross.
• Generation. Real but modest here, for the reason above.
• Body condition. Cavachons are companionable, food-motivated dogs that put on weight easily. A fair bit of the spread between two adults of the same frame is condition, not bone. You should be able to feel the ribs under a light cover and see a waist from above.
• Coat length. A fully coated Cavachon looks noticeably larger than a freshly groomed one at identical weight.

When they stop growing

Small breeds finish early. Most Cavachons do the bulk of their growing between six and ten months and reach full adult height by about twelve months. Weight may creep a little after that as the chest fills out, but the frame is done.

Signs of healthy growth

• Steady, gradual gain rather than sudden jumps or long flat stretches
• Ribs findable under a thin layer, waist visible from above
• Normal appetite, normal stools, age-appropriate energy
• An even coat that feels springy rather than dry, thin, or patchy

Call your veterinarian if your puppy loses weight, stalls for more than a week or two, seems unusually tired, or is growing very differently from what you expected. A vet with hands on your dog will always beat a chart on a screen.

About the word “teacup”

People search for teacup Cavachon, so we will answer it straight. Teacup is not a size. No registry recognizes it, no weight is officially attached to it, and it is a marketing label rather than a category of dog. It is typically used to justify a higher price.

What we give you instead is an honest estimate based on the actual parents and what we see in the puppy, labeled as the estimate it is. Given that both Cavachon parent breeds sit in the 12-to-18-pound neighborhood, a Cavachon that stays dramatically under that range is not a type — it is a dog worth asking a veterinarian about.