What Size Orthopedic Dog Bed Do I Need?
Senne HulsmansGetting the size wrong is the most common reason a perfectly good orthopedic bed ends up ignored in the corner of a room.
Usually it's too small — a dog with a leg hanging over the edge doesn't settle. Sometimes it's the opposite problem, where the bed is physically large but only a few centimetres thick, so within a couple of months the dog is effectively lying on the floor with a cover over it.
Most size charts give you length and width and stop there. This covers the two measurements that actually decide whether the bed still works next winter.
Start by measuring your dog properly
Wait until your dog is lying down and fully stretched out on their side — not curled up. Curled is the smaller version of your dog and it's how most people end up a size down.
Measure from the tip of the nose to the base of the tail. Not the end of the tail, the base of it.
Then add 15-20cm. That's the working number. The extra isn't generosity — it's the room a dog needs to change position through the night without a limb dropping off the edge, which matters more as they get older and shift more often.
If your dog sleeps sprawled out rather than curled, add 20cm rather than 15cm.
The first thing charts leave out: depth
Surface area gets all the attention. Depth is what determines whether a bed is still supporting your dog in six months.
Most dog beds are 5 to 8cm thick. That's enough to feel plush in a shop and enough to compress flat under a large breed within weeks. Once the foam bottoms out, there is nothing between your dog's hip and the floor, and the bed is doing nothing except looking like a bed.
As a rough guide:
- Under 15kg — 8cm or more
- 15-30kg — 12cm or more
- 30kg and over — 15cm or more
- Senior dogs of any weight — go deeper than their weight suggests
The material matters as much as the number. Solid foam and polyester fibrefill both take a permanent set — they flatten in the shape of your dog and stay there. High-resilience shredded foam redistributes when the dog gets up, which is why it holds its depth far longer under the same weight.
The second thing charts leave out: inner space versus outer size
This one catches almost everyone buying a bolster or sofa-style bed.
Bolster beds are usually advertised by their outer dimensions — the full footprint including the raised sides. But your dog doesn't sleep on the bolsters. They sleep in the space between them, which can be 30-40% smaller than the number on the listing.
With any bed that has raised sides, measure against the inner sleep space. If a retailer only publishes outer dimensions, that's worth an email before you buy.
Flat cushion beds don't have this problem — the advertised size is the usable size. It's the trade-off against the enclosure that bolsters give, which many anxious and older dogs prefer to lean into.
KovePaws sizing
Large Orthopedic Dog Bed — flat cushion, 18-21cm deep
Advertised size is usable size. High-resilience shredded sponge, roughly three times the depth of a standard bed.
XL — 80 × 64cm — £84.95
Medium-large breeds up to around 35kg. Cockers, Border Collies, Staffies, smaller Labs.
XXL — 100 × 75cm — £99.95
Labradors, Boxers, Dalmatians, German Shepherds. The most commonly correct size for a British large breed.
3XL — 120 × 95cm — £119.95
Great Danes, Mastiffs, Newfoundlands, Irish Wolfhounds.
See the Large Orthopedic Dog Bed
Royal Orthopedic Sofa — bolsters and pillow
Egg-crate foam base with raised sides on both ends. Four sizes, S to XL, with inner sleep spaces from 35 × 30cm up to 87 × 47cm.
Measure your dog against the inner space, not the outer sofa. Full inner dimensions for each size are on the product page.
Worth knowing: the sofa's inner space is narrower than the flat bed at comparable prices, because some of the footprint goes to the bolsters. If your dog sleeps stretched flat out, the cushion bed gives more usable room for the money. If they sleep pressed against something, the bolsters are the point.
When to size up
Size up if any of these are true:
- Your measurement lands within 5cm of the top of a size band
- Your dog sleeps stretched out rather than curled
- Your dog is still growing
- Your dog is a senior, or has been diagnosed with joint disease — they shift position more through the night and need the room to do it
- Two dogs share
A bed slightly too large costs you floor space. A bed slightly too small doesn't get used, which costs you the whole thing.
Being straight about what a bed does
A properly sized, properly deep bed keeps your dog's joints off a hard floor for the twelve-plus hours a day they spend lying down, and makes getting up easier than rising from laminate. That is genuinely worth having.
It is not a treatment. No bed reverses joint disease, and if your dog is showing signs of joint pain, the bed is the thing you do alongside a vet assessment, not instead of one. If you're not sure whether what you're seeing is age or something else, our guide to the early signs of dog joint pain covers the seven that get missed most.
Frequently asked questions
Can a dog bed be too big?
Not really, from the dog's point of view. Oversized beds are a room problem, not a dog problem. The only exception is anxious dogs, who often settle better in something that feels enclosed rather than a large open surface.
How do I measure a dog that won't lie still?
Measure them standing, nose to base of tail, and add 20cm instead of 15cm. Standing length runs slightly shorter than stretched-out length, so the extra covers it.
Should I size by weight or by length?
Length decides whether they fit. Weight decides how deep the foam needs to be. You need both — that's why sizing by weight alone so often goes wrong for tall, lean breeds.
My dog has always slept on the floor. Will they use a bed?
Often yes, if it's big enough and deep enough, and if it's placed against a wall or in a corner rather than in the middle of an open room. Dogs that have rejected previous beds have usually rejected thin ones, small ones, or badly placed ones.
How long should an orthopedic bed last?
Depends almost entirely on foam type and depth relative to the dog's weight. A 5-8cm bed under a 30kg dog is done in months. A deep high-resilience core under the same dog holds its shape for years.
Where to get more help
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