To choose the right dog bed size, measure your dog from nose to tail base while they are stretched out, then add roughly 6 to 12 inches, and size up further if your dog likes to sprawl or you want room to grow. Figuring out what size dog bed you need comes down to your dog’s measurements plus how they like to sleep. If you are shopping for a smaller dog, our small-dog bed picks are a good start, and the sizing method is below.
Quick Answer
Measure your dog nose to tail while stretched out, add 6 to 12 inches, and round up to the next bed size. Size up if your dog sprawls, changes position a lot, or you simply want them to have space. A bed that is a little too big is almost always better than one that is too small.
Why Trust This Guide
My dog is small, an 11-pound mix, but I deliberately bought her a larger bed so she has room to circle and stretch out, and she lays on it all day. Sizing up for a small dog is a choice I made on purpose, so the advice here to err toward more space comes from how I actually set up her bed.
Key Takeaways
- Measure nose to tail base while your dog is stretched out.
- Add 6 to 12 inches to that length for the bed size.
- Size up for sprawlers, position-changers, and growing puppies.
- A slightly large bed beats a slightly small one.
- Check the usable sleeping surface, not just the outer dimensions.
How to Measure Your Dog for a Bed
Start with a simple measurement while your dog is relaxed and stretched out on their side. Measure from the tip of the nose to the base of the tail to get their length, then measure the widest point for width. Add 6 to 12 inches to the length so there is room to shift and stretch, and use that number to pick the bed size. If your dog curls into a tight ball, you can lean toward the smaller end of that range, and if they stretch out long, lean toward the larger end. Doing this once takes a minute and saves you from guessing off a weight chart alone.
Dog Bed Sizes by Weight
| Dog weight | Typical bed size | Rough dimensions |
|---|---|---|
| Up to 25 lb | Small | Around 24 inches |
| 26 to 50 lb | Medium | Around 30 inches |
| 51 to 75 lb | Large | Around 36 inches |
| 76 to 100 lb | Extra large | Around 42 inches |
| 100 lb and up | Giant | 48 inches and up |
Weight is a starting point, not the final word. A long, lean dog can need a bigger bed than a stocky dog of the same weight, so always cross-check against your actual measurement.
Should You Size Up?
Sizing up is worth it more often than people expect. Dogs that sprawl, flip onto their backs, or change position through the night use more surface than their curled-up size suggests, and a bed with extra room lets them settle comfortably instead of hanging off the edge. Growing puppies also do better with a bed they can grow into. I sized up for my small dog specifically so she could circle and stretch out, and she uses every bit of that space. The main reasons not to size up are a tight room where a big bed will not fit, or a dog who genuinely prefers a snug, enclosed feel.
What If My Dog Is Between Sizes?
When your dog falls between two bed sizes, go with the larger one in almost every case. The extra space costs little and gives your dog room to move, while a too-small bed leaves them cramped or spilling onto the floor. The exception is a dog who loves to burrow and feel surrounded, since some of those dogs settle better in a snugger bed or one with raised sides. If you are weighing shapes as well as sizes, our guide on bolster vs flat dog beds covers which style suits which sleeper.
Measuring for the Right Bed Shape
Size and shape work together. On a flat or cushion bed, the whole surface is usable, so your measured length plus a few inches is what you need. On a bolster bed with raised sides, part of the footprint is taken up by the rim, so you need to look at the inner sleeping area rather than the outer dimensions, or the usable space can be smaller than it looks. Always check the listed interior measurement on bolster and cave beds so your dog actually gets the room you intended. For help narrowing down the overall style, see how to choose the right dog bed.
Do Different Breeds Need Different Bed Sizes?
Breed matters mainly through body shape, not just weight. Two dogs at the same weight can need different beds: a long, lean breed stretches out farther than a short, stocky one, so it needs a longer bed even at equal pounds. Breeds that sleep curled tight can suit a snugger or bolstered bed, while breeds that sprawl flat want extra open length. Puppies of large breeds are the trickiest, since they grow fast, so many owners size to the expected adult length from the start. The takeaway is the same across breeds: measure your actual dog stretched out rather than trusting a weight range alone, because body proportions vary more than the scale suggests.
Double-Check Before You Buy
Once you have your target size, confirm it against the specific bed you are considering rather than trusting the label name alone, since one brand’s large can differ from another’s. Read the listed dimensions, and for bolster or cave styles find the inner sleeping measurement. If you can, compare that number to your dog measured stretched out plus your added inches. This quick cross-check takes seconds and is the difference between a bed that fits comfortably and one that arrives surprisingly snug or larger than you pictured.
Recommended Reading
- the best beds for small dogs, a size-appropriate start.
- the best plush dog beds, cozy cushioned options.
- the best beds for large dogs, if your dog is bigger.
- how to get your dog to use their bed, once it arrives.
- how often to replace a dog bed, for down the road.
Dog Bed Sizing FAQ
How do I know what size bed my dog needs?
Measure your dog nose to tail base while stretched out, add 6 to 12 inches, and pick the bed size that matches. Cross-check against weight guidelines, and when in doubt, go up a size so your dog has room to stretch and shift.
Is it better to get a bigger or smaller dog bed?
Bigger is usually better. A slightly large bed gives your dog room to sprawl and change position, while a too-small bed leaves them cramped. The main exception is a dog who prefers a snug, enclosed feel, who may like a smaller or bolstered bed.
What size bed does a small dog need?
Most small dogs suit a bed around 24 inches, but you can size up if you want them to have extra space. I chose a larger bed for my small dog on purpose so she could circle and stretch, and she uses all of it, so do not feel locked to the smallest option.
Should I size up for a puppy?
Yes, if you want one bed to last. Sizing up lets a puppy grow into the bed rather than outgrowing a small one quickly. Just make sure it is not so large that it feels unsettling, and add a blanket to make it cozier while they are small.
How much bigger than my dog should the bed be?
Aim for about 6 to 12 inches longer than your dog measured nose to tail base. That gives enough room to stretch and reposition without being so large it feels empty. Sprawlers benefit from the higher end of that range.
Does bed shape affect the size I need?
Yes. On bolster and cave beds, the raised sides reduce the usable interior, so check the inner sleeping dimension rather than the outer size. On flat and cushion beds, the whole surface is usable, so your measured length plus a few inches is enough.
Can a dog bed be too big?
Rarely a problem, but a bed far larger than your dog can feel less cozy and takes up more room. If a big bed feels too open for a smaller dog, add a blanket for a snugger nook. For most dogs, a bit too big beats too small every time.
