Do Male Dogs Get Bigger Than Female Dogs? Size Facts

When you're choosing between a male and a female puppy, size is one of the first questions that comes up. Do male dogs get bigger than female dogs? Yes — in most breeds, males weigh 10–20% more and stand 1–3 inches taller than females of the same breed. But the real answer is more nuanced — because in toy breeds the difference is almost nothing, and in giant breeds it can exceed 30 lbs. Use our puppy weight calculator to see where your specific puppy falls on the growth curve right now.

Here's what the data actually shows about male vs. female dog size, how that gap develops over time, and what it means for you as an owner.

How much bigger are male dogs than female dogs?

The table below shows weight and height ranges for males vs. females across popular breeds, drawn from our breed dataset. These are AKC breed standards — the ranges your dog should fall within at full adult size.

Breed	Male Weight	Female Weight	Male Height	Female Height
Labrador Retriever	65–80 lbs	55–70 lbs	22.5–24.5 in	21.5–23.5 in
Golden Retriever	65–75 lbs	55–65 lbs	23–24 in	21.5–22.5 in
German Shepherd Dog	65–90 lbs	50–70 lbs	24–26 in	22–24 in
Rottweiler	95–135 lbs	80–100 lbs	24–27 in	22–25 in
Doberman Pinscher	75–100 lbs	60–90 lbs	26–28 in	24–26 in
Boxer	65–80 lbs	50–65 lbs	23–25 in	21.5–23.5 in
Siberian Husky	45–60 lbs	35–50 lbs	21–23.5 in	20–22 in
Standard Poodle	60–70 lbs	40–50 lbs	15–24 in	15–24 in
Great Dane	140–175 lbs	110–140 lbs	30–32 in	28–30 in
Cane Corso	99–110 lbs	85–99 lbs	25–27.5 in	23.5–26 in

A few things stand out in this data. The Standard Poodle has one of the largest proportional weight gaps of any large breed — males weigh 60–70 lbs while females weigh just 40–50 lbs, a difference of up to 30 lbs between the top of the female range and the top of the male range. The Great Dane has the largest absolute gap — a male Great Dane can outweigh a female by 35 lbs or more. At the other end, the Siberian Husky shows a modest but clear difference, with males averaging about 10 lbs more than females.

Do male dogs get bigger than female dogs in every breed?

Not quite. While do male dogs get bigger than female dogs is true as a general rule, there are meaningful exceptions — especially in toy and small breeds.

Several popular breeds show little to no size difference between males and females:

• Yorkshire Terrier: Males and females both weigh 4–7 lbs. No standard difference in height.
• Shih Tzu: Both sexes weigh 9–16 lbs with identical height ranges.
• Dachshund: Males and females both range from 16–32 lbs (standard) with the same 8–9 inch height.
• Beagle: Males and females both weigh 20–30 lbs with 13–15 inch heights — essentially identical by AKC standards.

The biological pattern here is called sexual size dimorphism — the degree to which males and females of a species differ in size. In dogs, this dimorphism scales with overall breed size: the bigger the breed, the bigger the gap between males and females. Toy breeds are nearly monomorphic (same size regardless of sex), while giant breeds show the most pronounced differences.

This pattern holds across the animal kingdom and is well-documented in domestic dogs. A 2009 study published in PMC analyzing morphometrics across dog breeds found that size dimorphism is consistent across breed sizes in dogs — meaning the proportional gap between males and females stays roughly similar across size categories, even as the absolute gap grows larger in bigger breeds.

How the male/female size gap develops as puppies grow

Here's something that surprises most owners: at 8 weeks old, your female puppy is already a slightly higher percentage of her adult weight than your male puppy. Based on our analysis of veterinary growth data from Salt et al. (2017) — a PLOS ONE study covering over 8 million vet-measured weight records — at 8 weeks of age:

• Large breed males have reached 16.2% of their adult weight
• Large breed females have reached 17.5% of their adult weight
• Giant breed males have reached 12.4% of their adult weight
• Giant breed females have reached 13.5% of their adult weight

So female puppies start out relatively closer to their adult size. The reason the male still ends up larger isn't that he grows faster — it's that he has a higher ceiling. A male Labrador at 16.2% of 72 lbs is already heavier than a female Lab at 17.5% of 62 lbs, even though the female is proportionally "further along."

The gap in absolute terms grows steadily through puppyhood. It's most visible between 4 and 9 months, during the fastest phase of growth for both sexes. At 4 months (16 weeks), large breed males have reached 41.4% of their adult weight and females have reached 43.4% — both pushing hard, but toward different finish lines.

As you can see, tracking where your specific puppy falls on the growth curve is more informative than guessing by sex alone. The puppy weight calculator uses breed, sex, current age, and current weight to generate a personalized growth projection. You can see how our growth predictions work if you want to understand the underlying model.

How the size gap varies by breed size category

The table below shows when males and females of each size category complete their growth, based on our veterinary growth data from Salt et al. (2017). Notice how the gap in final timing also changes — and how toy breeds converge to the same endpoint for both sexes.

Size Category	Adult Weight Range	Male Reaches 100% at	Female Reaches 100% at	Sex Size Gap
Toy (under 14 lbs)	0–14 lbs	36 weeks	36 weeks	Negligible
Small (14–25 lbs)	14–25 lbs	46 weeks	46 weeks	Minimal (0–3 lbs)
Medium (25–50 lbs)	25–50 lbs	46 weeks	54 weeks	Moderate (5–10 lbs)
Large (50–90 lbs)	50–90 lbs	64 weeks	66 weeks	Meaningful (10–20 lbs)
Giant (90+ lbs)	90–250 lbs	84 weeks	84+ weeks	Large (15–40 lbs)

One interesting finding: in medium breeds, females actually take longer to complete their growth (54 weeks) compared to males (46 weeks). In large breeds, females finish at 66 weeks vs. males at 64 weeks. This suggests that across size categories, female dogs don't just end up lighter — they also have a slightly longer growth window, even though their final size is smaller. Read more about how breed category affects growth timelines in our guide to when large breed puppies stop growing.

Does neutering affect how big a male dog gets?

This is one of the most common — and most underappreciated — questions around male dog size. The answer is yes, and the effect is more significant than most owners expect.

When a male dog is neutered, his testosterone levels drop sharply. Testosterone plays a role in signaling the growth plates (the cartilage zones in developing bones) to close. When you remove that signal early, the growth plates stay open longer — and your dog's bones keep growing. The result is a dog that can end up taller than he would have been if left intact, with longer limbs and a leaner, more angular build.

This effect is most pronounced in large and giant breeds, where the growth window is already long. Research on this topic has been particularly robust for Golden Retrievers and Labrador Retrievers — breeds where early neutering is associated with not just altered size but also higher rates of joint problems like hip dysplasia and cruciate ligament tears, likely because the longer-growing bones create biomechanical imbalances.

Current veterinary guidance generally recommends:

• Medium breeds: Neuter at 6–12 months is typically fine
• Large breeds (50–90 lbs): Wait until 12–18 months for skeletal maturity
• Giant breeds (90+ lbs): Some vets recommend waiting until 18–24 months

If you want to predict your intact male's likely adult size without the neutering variable, plug his current weight and age into our free puppy weight calculator — it accounts for breed sex differences in its growth projections.

What the male/female size difference means for you as an owner

Whether you're choosing between a male and female puppy, or just trying to plan ahead for the one you already have, here's where the size difference actually shows up in daily life:

Food and calories

A 10–15 lb difference in adult weight translates directly to feeding amounts. A 75 lb male Lab will generally eat more than a 62 lb female Lab — sometimes noticeably more. Most food brands give portion guidance by weight, so knowing your dog's sex and expected adult size is useful for budgeting food costs and preventing overfeeding. Under-portioning a large male because you're used to feeding a smaller female is one of the more common mistakes in multi-dog households.

Crate and gear sizing

A male German Shepherd at 90 lbs needs a larger crate than a female German Shepherd at 70 lbs — and those two sizes are not the same crate. If you're purchasing a crate or car barrier for a puppy, factor in your puppy's sex when estimating the adult size you're planning for. The difference of a size category in crates can mean the difference between a comfortable adult dog and one that can't fully stand up or turn around.

Leash and harness strength

For large and giant breeds, the difference in pulling force between a 140 lb male Great Dane and a 120 lb female Great Dane is real. Male dogs also tend to retain more of the "exuberant pulling" behavior longer, particularly if they're intact. If you're a smaller person choosing a breed, the sex of the dog is worth factoring into that calculation — a female Rottweiler at 80–100 lbs is a genuinely different physical proposition than a male at 95–135 lbs.

Space and costs

Larger dogs generally cost more to own — more food, larger supplies, higher vet costs for weight-dosed medications, and bigger everything else. This isn't a reason to prefer one sex, but it's a real budget consideration when choosing between a male and female of a large or giant breed.

Predicting your puppy's adult size by sex

The most accurate predictor of your individual puppy's adult size is a combination of breed (or estimated breed mix), current age, current weight, and sex. A male Labrador and a female Labrador at the same 12-week weight will not end up the same adult size — the male puppy is running a faster absolute trajectory toward a higher ceiling.

For mixed breed dogs, sex still matters — males will typically end up larger than their female littermates even if both are crosses of the same two breeds. How much larger depends on which parent breeds contributed to the litter. Our guide to predicting mixed breed puppy size covers this in more detail.

Understanding how puppies grow week by week can also help you track whether your specific dog is growing on pace for his or her sex — because a female that's growing as fast as a typical male may be heading toward the top of the female weight range, which is worth knowing early.

The bottom line on male vs. female dog size

Do male dogs get bigger than female dogs? As a rule, yes — but the scale of that difference depends entirely on the breed. In giant breeds like the Great Dane and Rottweiler, choosing a female over a male means a meaningfully different dog to manage: lighter, shorter, and growing to a lower ceiling. In toy breeds, the choice between male and female has essentially no impact on size.

What matters most for predicting your individual puppy's adult size isn't just sex — it's breed, current weight, and age together. Our free puppy weight calculator combines all three to give you a breed-specific, sex-adjusted growth projection for your dog. It's the most accurate way to know not just whether males get bigger, but how big your dog will actually get.

Male vs. female dog size: frequently asked questions

Do male dogs get bigger than female dogs?

In most breeds, yes. Male dogs typically weigh 10–20% more and stand 1–3 inches taller than females of the same breed. The gap is largest in giant breeds and nearly nonexistent in toy breeds. Our breed dataset shows that large breed males weigh 10–20 lbs more than females on average, while giant breed males can outweigh females by 30–40 lbs.

How much bigger are male dogs than female dogs?

It varies significantly by breed. A male Labrador Retriever weighs 65–80 lbs while a female weighs 55–70 lbs — about 10–15 lbs difference. A male Great Dane weighs 140–175 lbs while a female weighs 110–140 lbs — up to 35 lbs difference. A male Yorkie and female Yorkie are both 4–7 lbs — no meaningful difference at all.

Do male dogs grow faster than female dogs?

Not exactly faster — but males grow toward a higher ceiling and finish at a slightly different time. Based on our veterinary growth data from Salt et al. (2017), large breed males complete their growth at week 64 while females finish at week 66. Females are proportionally closer to their adult size at each age checkpoint, but their lower adult weight ceiling means they end up lighter despite taking marginally longer to finish growing.

Does neutering a male dog affect how big he gets?

Yes. Neutering before growth plates close delays plate closure, which can lead to longer limbs and a taller, leaner build in large and giant breeds. Many vets now recommend waiting until 12–18 months for large breeds before neutering to allow normal skeletal development. The effect is minimal in small and toy breeds whose growth plates close early regardless.

Are female dogs always smaller than males in every breed?

No. In toy breeds like Yorkies, Shih Tzus, and Chihuahuas, males and females are the same size by AKC breed standards. In some small breeds like Beagles and Dachshunds, the male and female weight ranges are identical. Sexual size dimorphism in dogs scales with breed size — it's most pronounced in giant breeds and nearly absent in toy breeds.

At what age is the male/female size difference most noticeable?

The gap builds steadily from birth and is most visible between 4 and 9 months, when both sexes are in their fastest growth phase. By 12 months, large breed males are at 96.0% of their adult weight and females are at 95.9% — nearly identical percentages, but the male's adult weight target is meaningfully higher. The full adult size difference is only apparent once both dogs have finished growing.