Most dogs end up in beds that are too small. Not because their owners didn't care, but because the most visible number on the product page was the weight limit, and the dog was under it. Weight is a useful check. It isn't the right place to start.
The right place to start is a tape measure.
How to measure your dog
The measurement that matters is nose to tail: from the tip of the nose to the base of the tail, where it meets the body. Not the tip of the tail, which folds, tucks and wags whatever the bed does.
Measure your dog stretched out, not curled up. This is the part most guides skip. A resting dog curls, but a dog in deep sleep stretches out, with joints extended, spine straight and weight spread along its full length. That's the position its body recovers in, and the bed has to support it.
If your dog won't stretch on command, wait until it's properly asleep. Most dogs stretch out within a few minutes of settling.
Curled up and stretched out
A bed with bolsters has two sizes that matter: the full footprint, and the flat sleeping area inside the bolsters. A good fit uses both.
Curled up, a dog takes up a circle roughly half its nose-to-tail length across. That should fit inside the bolsters, so your dog can turn and settle without hanging over an edge.
Stretched out, a dog at the upper end of a size lies with its head or back against a bolster. That's what bolsters are for: a firm edge to rest a head on or lean against, which takes strain off the neck and shoulders.
So check two things: your dog's length against the size's nose-to-tail limit, and half that length against the width inside the bolsters.
Weight as a second check
Weight matters, but not as a stand-in for length. A compact, dense breed can weigh far more than a longer, leaner one of the same height. Weight matters because heavier dogs press harder into the foam, and the foam has to be firm enough to hold them off the floor.
Use the weight guide to confirm, not to start. Measure first. If the length and weight point to different sizes, go with the length and check the weight fits the larger size.
How your dog sleeps
Dogs sleep in two broad ways: curled and sprawled. Sprawlers stretch out fully, and use every inch of the bed.
If your dog sprawls, be generous with the size. If your dog curls, the measurement still applies, because the same dog that curls in light sleep stretches out in deep sleep. A bed sized for the curl is sized for the lightest part of the night, not the part where recovery happens.
A note on breed lists
Size guides that list breeds next to each size are useful as a reference, not a rule. Breed standards describe averages, and individual dogs vary a lot. A Labrador Retriever can weigh anywhere from 55 to 80 lb and measure anywhere from 30 to 38 in nose to tail. A list that puts Labradors in Large can't know where your Labrador sits in that range.
Use breed lists to get your bearings. Use the tape measure to decide.
KINNE's two sizes
| Standard | Large | |
|---|---|---|
| Outer dimensions | 37 × 29 × 9 in | 45 × 35 × 9 in |
| Sleeping area inside the bolsters | 25 × 17 in | 33 × 23 in |
| Height | 9 in (5 in sleeping surface + 4 in bolsters) | 9 in (5 in sleeping surface + 4 in bolsters) |
| Dog weight | Up to 55 lb | Up to 90 lb |
| Nose to tail | Up to 31 in | Up to 39 in |
A dog at the Standard limit of 31 in curls to about 16 in across, which fits inside Standard's 17 in width. A dog at the Large limit of 39 in curls to about 20 in, inside Large's 23 in. If your dog is near the upper limit of Standard, or always sleeps stretched out, take the Large.