One of the OG Poodle mixes – the Goldendoodle – has got to be one of the most well-known and popular Doodles out there. There are so many different varieties of the Golden Retriever-Poodle mix, as they have been around for the longest. In this guide, we’re going to focus on the F1b Goldendoodle variety, which is arguably one of the most coveted picks by Doodle lovers. If you’re thinking about getting one or already have one at home, then you’d probably like to learn more about the full grown F1b Goldendoodle size and growth patterns. And that’s exactly what we’re going to cover in this article!
Not only are Goldendoodles so popular because they’ve been bred for decades now, they have the most wonderful qualities anyone could ever wish for in a dog. They’re so loving, playful, cheeky, and outgoing pups that make truly amazing pets for almost anyone. But not just that! Goldendoodles can also become great therapy and emotional support dogs, even service dogs.
What makes the F1b Goldendoodle so in-demand is that they’re low-shedding, even hypoallergenic, some might say. But aren’t all Goldendoodles like that? Well, that’s not necessarily the case…
Table of Contents
How Generation Can Affect F1b Goldendoodle Size & Other Traits
As there are many different varieties to the Goldendoodle, it’s vital that you know that not all of them are the same, nor do they have the same characteristics. Essentially, Goldendoodle generations tell us how a litter of Goldendoodles was bred. This also helps us gain a better understanding of how the puppies may turn out in terms of their potential for shedding, coat type, and even size. As we know, when combining two different purebred dogs, the outcome may surprise us. However, when it comes to the Goldendoodle, F1b size may be a bit easier to predict.
So, let’s first take a look at all the possible Goldendoodle generations and what each of them represents:
| 1st Parent | 2nd Parent | % Golden Retriever* | % Poodle* | |
| F1 Goldendoodle (first-generation) | Golden Retriever | Poodle | 50% | 50% |
| F1B Goldendoodle (first-generation backcross) | F1 Goldendoodle | Poodle | 25% | 75% |
| F1BB Goldendoodle (first-generation backcross backcross) | F1B Goldendoodle | Poodle | 12.5% | 87.5% |
| F2 Goldendoodle (second-generation) | F1 Goldendoodle | F1 Goldendoodle | 50% | 50% |
| F2B Goldendoodle (second-generation backcross) | F1 Goldendoodle | F1B Goldendoodle | 37.5% | 62.5% |
| F2B Goldendoodle (alternate cross) | F2 Goldendoodle | Poodle | 25% | 75% |
| F3 / Multigen Goldendoodle | F1B Goldendoodle or higher | F1B Goldendoodle or higher | Varies | Varies |
*These are generic calculations only – genetics are rarely mathematically accurate.
Full Grown F1b Goldendoodle Size Predictions
Whenever we’re trying to predict full grown F1b Goldendoodle size, we must first understand their lineage. Golden Retrievers are quite large dogs with an average weight of 55 to 75 pounds as adults, and they usually grow up to 21 to 24 inches tall at the shoulders. However, it’s not unlikely for a purebred Golden Retriever to grow even heavier and taller than that!
On the other hand, the Poodle comes in three distinct size categories – Standard, Miniature, and Toy. Obviously, the largest is the Standard Poodle with a weight between 38 and 70 pounds. Sometimes even more. The Mini variety weighs about 10 to 20 pounds, whereas the smallest Toy Poodles weigh as little as 4 pounds and up to 12 pounds.
One thing to remember with hybrid breeds is that there’s no way to guarantee the puppies’ size and coat types. However, as we learned from the Goldendoodle generations chart above, F1b Goldendoodles do have a slight advantage here, as their genetic makeup often has a higher percentage of Poodle.
F1b Goldendoodles have an F1, or first-generation Goldendoodle parent that’s been bred back to a Poodle. The F1 Goldendoodle is the direct offspring of a purebred Golden Retriever and Poodle, which means that it can be very difficult to actually predict their traits. However, when mating the F1 Goldendoodle with a Poodle, we may have more control over the outcome.
As a result, it’s safe to assume that full grown F1b Goldendoodle size may be more inclined to take after the Poodle parent, depending on which size of Poodle they were bred with. So, how big do F1b Goldendoodles get?
Full Grown F1b Goldendoodle Size Chart
| Standard F1b Goldendoodle size | Mini/Medium F1b Goldendoodle size | Toy F1b Goldendoodle size | |
| Weight | 50-90 pounds | 25-50 pounds | 10-25 pounds |
| Height* | 20-26 inches | 15-20 inches | 15 inches or less |
| Age at Full-Grown | 12.5-16 months | 11-13 months | 7.5-11 months |
*A dog’s height is measured from their withers. That’s the highest part of their shoulder blades.
Regardless if we’re talking about a Standard, Mini, or Toy F1b Goldendoodle, the size of the pup will largely depend on the size of its parents. And, of course, their genetics. When it comes to F1b Goldendoodles, we can expect the size of the Poodle used in the mix to affect the outcome the most, as they have been bred back to a Poodle.
For example, if you’re looking for a smaller F1b Mini Goldendoodle, then you might want to opt for a mix where an F1 Mini Goldendoodle has been bred back to a Miniature Poodle. Likewise, it’s easier to achieve very small Toy F1b Goldendoodles when the first-generation Goldendoodle parent is already on the smaller end of the scale to begin with.
Although reputable Doodle breeders cannot guarantee the full grown F1b Goldendoodle size, they can take certain steps throughout the breeding process, such as the one we just mentioned, and also inform you about their breeding practices, past litters, and potential outcomes.
F1b Goldendoodle Size Charts & Growth Patterns
Indeed, F1b Goldendoodles are something special. Nonetheless, they follow the same growth patterns as most other dogs, depending on their estimated adult size. Like other pups, F1b Goldendoodles grow the fastest in the first 50% of their adult weight. Overall, this correlates to the first six months of their life. However, it’s important you keep in mind that larger Goldendoods will take longer to grow into their full size than smaller pups.
Once your F1b Goldendoodle puppy reaches half its full weight, their growth will start to gradually slow down and plateau some time around their first birthday, give or take. Again, this will depend on their estimated adult size. Interestingly enough, puppies tend to reach their full adult height a bit sooner than their full grown weight, making them look a bit funny with their long legs and slim bodies. Then, it’s time for them to gain some more weight and fill out.
Tip for Goldendoodle parents: Be sure to try our interactive Doodle Weight Calculator to track and predict your F1b Goldendoodle’s full grown size. Enter your Doodle’s type, estimated adult size, current weight in pounds, as well as current age in weeks, and our calculator will reveal you the results!
The largest of them all, Standard F1b Goldendoodles, usually weigh anywhere from 50 to 90 pounds once adults. They tend to reach half their adult weight some time between 4.5 and 6 months of age, and their full adult weight around 12.5 and 16 months old. Larger Standard Goldendoodles may take even up to two whole years!
If you’d like to predict your Standard F1b Goldendoodle’s full grown size, then this simple formula can give you some estimates:
Mini & Medium F1b Goldendoodle Size Chart
The slightly smaller Mini F1b Goldendoodle weighs between 25 and 50 pounds as an adult. These pups will also reach half their adult weight a bit sooner than standard-sized pups, around 3.5 and 5 months of age. Similarly, they’ll also reach their full adult weight sooner and likely plateau at their adult weight between 11 and 13 months of age.
For Minis and Mediums, you’ll also need a different formula for calculating their predicted adult weight:
Toy F1b Goldendoodle Size Chart
The full grown F1b Goldendoodle size for the smallest of the bunch, Toy Goldendoodles, usually ranges between 10 and 25 pounds. These puppies tend to grow the fastest, reaching 50% of their adult weight around 3.5 months of age. They will then continue to grow at a slower pace, plateauing at their full adult weight somewhere between 7.5 and 11 months old, depending on their size.
As the calculations are different for all size categories, you’ll want to use this formula specially tailored for Toy F1b Goldendoodles:
Alternative Formula
There’s also another formula that you can use to “guesstimate” your full grown F1b Goldendoodle puppy size:
Full Grown F1b Goldendoodle Size Chart: Final Thoughts
Whether you’re still deciding between which F1b Goldendoodle to adopt or already have brought your new best pal home, knowing what to expect in terms of their size and growth patterns is vital. Hopefully this article managed to answer all of your questions on this topic, so you can be well prepared for many years to come with a wonderful Dood by your side!
Learn How to Care for Your Doodle Puppy!
Perfect for first-time Doodle parents, get ALL your questions answered, including questions new Doodle parents don’t even think to ask.
Plus, get $700 worth of Bonus Materials for FREE, including:- Doodle Parenthood Community and Support Group ($190 value)
- Doodle Puppy Growth Tracker ($20 value)
- EMERGENCY Cheatsheet: When To Call The Vet Immediately ($50 value)
- HELP! Button ($145 value)
- And SO MUCH MORE!
