Which to choose overall?
Small space and don't mind barking, Pomeranian; room to spare and want a calm giant good with kids, Mastiff.
Mastiff (English Mastiff) or Pomeranian? On paper they differ most on apartment suitability, and on the scales Mastiff (English Mastiff) is the heavier at 120–250 lbs. Here is how the two compare on everything that shapes an ordinary week.


This is for someone already down to Mastiff (English Mastiff) and Pomeranian and deciding between them. For this pair the decision usually turns on apartment suitability and barking, so those are covered first and in most detail. Anyone choosing from a flat has a clear answer here: Pomeranian rates 5/5 against 2/5. There is no origin story here — only what changes about your week.
Between Mastiff (English Mastiff) and Pomeranian, apartment suitability is what separates them; neither is the lower-effort dog overall.
Choose Mastiff (English Mastiff) if you do not want a standing grooming appointment, shedding is a problem in your house and your walking routine is modest.
Choose Pomeranian if you are in a flat or a smaller home, this is your first dog and a smaller dog suits your car, your home or your back.
| Feature | mastiff | pomeranian | Winner |
|---|---|---|---|
| Size class | giant | small | Equal |
| Weight | 120–250 lbs | 3–7 lbs | Equal |
| Height | 27–32 in | 8–11 in | Equal |
| Lifespan | 9–11 years | 12–16 years | pomeranian |
| Exercise need | Low (2/5) | Moderate (3/5) | mastiff |
| Grooming need | Low (2/5) | High (4/5) | mastiff |
| Shedding | Moderate (3/5) | High (4/5) | mastiff |
| Energy level | Low (2/5) | High (4/5) | Equal |
| Barking | Very low (1/5) | High (4/5) | mastiff |
| Apartment suitability | Low (2/5) | Very high (5/5) | pomeranian |
| Good for first-time owners | Low (2/5) | Moderate (3/5) | pomeranian |
| Tolerates being alone | Moderate (3/5) | Low (2/5) | mastiff |
| Trainability | Moderate (3/5) | Moderate (3/5) | Equal |
| Good with kids | Very high (5/5) | Moderate (3/5) | mastiff |
| Good with other dogs | Moderate (3/5) | Moderate (3/5) | Equal |
| Friendly to strangers | Moderate (3/5) | Low (2/5) | mastiff |
| Cost level | Very high (5/5) | Moderate (3/5) | pomeranian |
| Coat | Short, dense | Double coat, fluffy | Equal |
| Origin | England | Germany/Poland | Equal |
| Typical monthly cost | $150–$350 | $80–$150 | Equal |
| Typical first-year cost | $2,200–$4,500 | $1,200–$2,200 | Equal |
At 3-7 lbs, the Pomeranian is roughly the size of a Mastiff's paw, the Mastiff's 120-250 lb range makes this one of the largest size mismatches in this whole batch. Height runs 27-32 inches against just 8-11. Whatever else separates these two breeds, the scale of the size gap alone rules out most direct comparisons of daily handling.
The Pomeranian is the more energetic dog day to day, energy level high (4/5) against the Mastiff's low (2/5), though exercise need is closer, moderate (3/5) for the Pomeranian versus the Mastiff's low (2/5). Small breeds often carry more restless energy indoors even when their actual exercise requirement is modest, and that pattern holds here.
The Pomeranian needs considerably more coat care, high (4/5) against the Mastiff's low (2/5), that fluffy double coat needs regular brushing to avoid matting. Shedding tells a similar story: Pomeranian high (4/5), Mastiff moderate (3/5). For a dog this small, the Pomeranian's grooming demands are surprisingly close to what you'd expect from a much bigger breed.
The Pomeranian barks a lot, high (4/5) against the Mastiff's very low (1/5), a common trait in small alert breeds that can surprise new owners. Apartment suitability favors the Pomeranian clearly, very high (5/5) against the Mastiff's low (2/5), though its higher exercise and grooming needs mean small-space living still takes some effort.
Trainability is closer than the size gap might suggest, moderate (3/5) for both breeds, and first-time-owner suitability tells a similar story, moderate (3/5) for the Pomeranian against the Mastiff's low (2/5). Neither breed is a top-tier easy trainer, just for very different reasons: the Mastiff's size demands consistency, the Pomeranian's boldness needs firm, patient handling from the start.
The Mastiff rates higher with kids, very high (5/5) against the Pomeranian's moderate (3/5), a small, bold dog around young children carries more risk of injury than temperament alone suggests. The Mastiff also edges ahead with strangers, moderate (3/5) against the Pomeranian's low (2/5); both tie at moderate (3/5) for compatibility with other dogs in the household.
The Pomeranian lives notably longer, 12-16 years against the Mastiff's 9-11, a gap of up to seven years at the extremes. Hypothyroidism is the one condition shared between both health lists; otherwise the Mastiff's risks lean toward cancer and heart disease while the Pomeranian's include tracheal collapse and hypoglycemia, both more typical of very small breeds.
The Mastiff costs substantially more, very high (5/5) against the Pomeranian's moderate (3/5), with monthly costs of $150-350 versus $80-150, and first-year costs of $2,200-4,500 against $1,200-2,200. The Pomeranian can cost less than half as much to keep in that first year of ownership.
Mastiff (English Mastiff) weighs 120–250 lbs and lives 9–11 years; Pomeranian weighs 3–7 lbs and lives 12–16 years. The two diverge most on apartment suitability, barking and grooming need and 3 other rated axes. They are level on good with other dogs and trainability, so those cannot decide it. Where the table declares a winner it means less work for the owner, nothing more; descriptive rows are left as ties on purpose. The value here is in the differences between the two columns; treat any single score as approximate.
About as extreme as it gets on this site, the Mastiff can weigh up to 250 lbs, the Pomeranian as little as 3 lbs.
The Pomeranian, rated high (4/5) against the Mastiff's very low (1/5).
The Pomeranian rates a bit better, moderate (3/5) against the Mastiff's low (2/5), though neither is a top-tier beginner pick.
The Pomeranian, very high (5/5) against the Mastiff's low (2/5), though its grooming and barking needs still require some effort in a small space.
Significant, $150-350 monthly and $2,200-4,500 in year one for the Mastiff, against $80-150 and $1,200-2,200 for the Pomeranian.
Hypothyroidism is the one condition on both lists. Otherwise their health concerns diverge sharply, reflecting how different giant-breed and toy-breed medical issues tend to be.
The Pomeranian, by a wide margin, 12-16 years against the Mastiff's 9-11.
Small space and don't mind barking, Pomeranian; room to spare and want a calm giant good with kids, Mastiff.
Mastiff $150-350 versus Pomeranian $80-150, the Mastiff costs well over double.
Pomeranian moderate (3/5), Mastiff low (2/5), a small gap despite the size difference.
Pomeranian 12-16 years, Mastiff 9-11 years.






Health information here is general and is not veterinary advice. If your dog shows pain, sudden behaviour change, or worsening symptoms, consult a licensed veterinarian.
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