Why size matters more than you think
Choosing a pet urn is one of the most personal decisions you'll make after losing a companion. But among the style, material, and personalisation choices, one purely practical question trips up many families: will the urn actually fit?
An urn that's too small can't hold all the ashes, which is distressing to discover after the fact. One that's dramatically too large can feel hollow and impersonal. Getting the size right means you can focus entirely on the meaning of the memorial, not logistics.
The good news: sizing is straightforward once you know the formula. Here's everything you need.
The sizing formula explained
Cremation produces roughly 1 cubic inch of ashes per pound of body weight. This is the industry benchmark used by the International Cemetery, Cremation and Funeral Association (ICCFA) and most professional cremation providers.
Because urn capacity is typically listed in millilitres (ml), the conversion you need is: 1 cubic inch = 16.39 ml.
At LovaPaws, we apply an additional 15–25% safety margin on top of the theoretical minimum. This buffer accounts for ashes sealed in a bag (which takes up more space than loose ashes), slight variation between individual animals, and ensures the lid closes properly. Always choose the next size up if your pet's weight falls near the top of a range.
Full sizing guide by pet weight
| Pet Weight | Recommended Capacity | Common Pets | LovaPaws Recommended Size |
|---|---|---|---|
| Up to 5 lb (up to 2.3 kg) |
130–200 ml | Kitten, Rabbit, Guinea Pig, Hamster, Ferret, Chihuahua, Teacup Yorkie, Toy Poodle | Keepsake / mini urn (150 ml) — full ashes for very small pets; partial ashes for others |
| 6–15 lb (2.7–6.8 kg) |
250–330 ml | Most cats (Domestic Shorthair, Siamese, Persian, Russian Blue), Yorkie, Maltese, Pomeranian | 330 ml urns — best for most cats and toy/small dog breeds |
| 16–25 lb (7.3–11.3 kg) |
410–500 ml | Larger cats (Maine Coon, Ragdoll), Shih Tzu, Boston Terrier, Miniature Schnauzer, French Bulldog (small) | ~500 ml urns; consider 660 ml if pet is near upper end of range |
| 26–35 lb (11.8–15.9 kg) |
575–660 ml | French Bulldog, Corgi, Beagle, Cocker Spaniel, Shetland Sheepdog | 660 ml urns — a comfortable fit for this range |
| 36–50 lb (16.3–22.7 kg) |
800–1,100 ml | Border Collie, Australian Shepherd, English Bulldog, Siberian Husky (smaller), Standard Poodle (small) | 800 ml or 1,100 ml urns |
| 51–75 lb (23.1–34 kg) |
1,100–1,500 ml | Golden Retriever, Labrador Retriever, German Shepherd, Siberian Husky, Boxer, Standard Poodle | 1,500 ml urns for this range; 1,100 ml only for smaller end |
| 76 lb+ (34.5 kg+) |
1,500 ml+ | Rottweiler, Alaskan Malamute, Great Dane, Saint Bernard, Newfoundland, English Mastiff, Irish Wolfhound | 1,500–1,600 ml; confirm final ashes volume with cremation provider for giant breeds |
Shop by size: LovaPaws urns
Our urns come in a range of carefully tested capacities. Here's a guide to which LovaPaws products match each size tier, with direct links so you can explore the right one for your pet.
For cats & small dogs (up to ~15 lb) — 330 ml urns
These cover the vast majority of domestic cats and toy/small dog breeds. Our 330 ml urns are the most popular size we carry.
For medium dogs (16–35 lb) — 500–660 ml urns
French Bulldogs, Beagles, Corgis, and Cocker Spaniels typically fall here. Our 660 ml urns provide a confident fit with room to spare.
For larger dogs (36–75 lb) — 800–1,500 ml urns
Border Collies, Golden Retrievers, Labradors, and German Shepherds need urns in this range. Always confirm with your cremation provider for dogs over 60 lb.
For very small pets & keepsakes — mini urns (150 ml)
Kittens, rabbits, ferrets, guinea pigs — and as a keepsake urn for a portion of any pet's ashes, kept close to you.
5 practical tips before you order
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1
Use your pet's body weight before cremation. Cremation removes most moisture and organic matter, but the sizing formula is always based on the original live weight — not the weight of the ashes themselves.
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2
Ask your cremation provider for the ashes volume in cubic inches or ml. Many providers will give you this before you collect. It's the most reliable measurement and removes all guesswork.
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3
Account for the sealed bag. Most providers return ashes in a sealed plastic bag inside the urn. A bag takes up more space than loose ashes — this is exactly why LovaPaws applies a 15–25% safety margin beyond the theoretical minimum.
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4
When in doubt, size up. An urn that's a little larger than strictly necessary still feels dignified and proportionate. An urn that won't close is not something you want to discover after personalisation.
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5
Consider a keepsake urn alongside the main urn. Many families keep the primary urn at home and carry a small keepsake urn or keychain with a portion of ashes. This is especially meaningful if multiple family members want to keep their pet close.
Beyond size: choosing the right style
Once you've confirmed the right capacity, the style choice is about what feels most meaningful. Here are the main approaches and the LovaPaws products that best represent each.
Watercolor & portrait
A painted likeness of your pet on the urn itself — soft, artistic, and deeply personal.
Shop portrait urns →Photo window
Their actual photograph visible every day, built into the ceramic. Nothing is more direct.
Shop photo urns →Minimal & engraved
Clean ceramic or ceramic with name only — timeless and subtle for those who prefer understated design.
Shop engraved urns →Wood & mixed materials
Wooden box urns with photo frames — a warmer, more natural feel that doubles as décor.
Shop wood urns →Find the perfect urn for your pet
All LovaPaws urns are made to order — personalised with your pet's name, portrait, or photo. Browse the full collection to find the one that feels right.
Browse pet memorial urns
