“About right” is not really a size.
A dog collar can look perfect in a photo, but if it is too tight, too loose, or sitting in the wrong place, it will not feel good for your dog. The right fit should be comfortable, secure, and easy to wear every day.
This dog collar size guide will help you measure your dog’s neck, check the fit, and choose a collar that works for real walks, not just product photos.
1. Measure your dog’s neck
To find the right dog collar size, start by measuring around your dog’s neck where the collar naturally sits.
Use a soft measuring tape and keep it flat against the fur. Do not pull too tightly. If you do not have a measuring tape, use a piece of string, mark the length, then measure it with a ruler.
The measurement should feel close to the neck, but not tight. You are measuring your dog, not wrapping a parcel.
2. Use the two-finger rule
Once the collar is on, check the fit with the two-finger rule.
You should be able to fit two fingers comfortably between the collar and your dog’s neck.
If you cannot fit two fingers, the collar may be too tight.
If you can fit more than that very easily, it may be too loose.
A comfortable dog collar should sit securely without pressing into the neck. Your dog should be able to move, sniff, walk, sit, and do all the important dog business without noticing it too much.
3. Check the Fur Sie collar sizes
Fur Sie collars are 2 cm wide and adjustable in three sizes:
Small: 23–32 cm
Medium: 30–45 cm
Large: 40–65 cm
Because the sizes are adjustable, there is some overlap between them. That is useful, especially for dogs with thick fur, changing coats, or measurements that sit between two sizes.
The best size is not always the smallest size your dog can technically fit into. It is the one that gives a comfortable, secure fit with enough room to adjust.
4. What if your dog is between sizes?
If your dog is between two collar sizes, check where their neck measurement sits within the adjustable range.
If the measurement is close to the upper end of one size, sizing up may give you more flexibility. If it sits comfortably in the middle of a size, that size is usually the better choice.
For example, a dog measuring 31 cm may technically fit a Small, but a Medium may allow more room for adjustment. A dog measuring 43 cm may fit a Medium, but a Large may be more comfortable if they have thick fur or need extra room.
The goal is not the tightest possible fit. The goal is a comfortable, secure fit that still leaves room to adjust.
5. Check where the collar sits
A dog collar should sit around the middle of the neck, not too high under the ears and not too low on the shoulders.
If it slips too much, it may be too loose. If it leaves marks, rubs, or makes your dog scratch, it may be too tight or not the right shape for them.
The best dog collar is the one your dog can wear easily, without you needing to keep adjusting it every five minutes.
6. Fur changes everything
A freshly groomed dog and a fluffy dog are not the same size, at least not when it comes to collars.
If your dog has thick fur, curly fur, or regular haircuts, check the collar fit after grooming and again when the coat grows back.
A collar that fits perfectly in winter may feel a little different after a summer haircut. A collar that looked loose last month may suddenly sit closer to the neck.
Dogs change. Their collar fit should be checked every now and then too.
Quick collar fit checklist
Before choosing a dog collar size, ask:
Can I fit two fingers under the collar?
Does it sit comfortably around the neck?
Does it stay secure without slipping too much?
Can my dog move naturally?
Is there room to adjust if needed?
Does my dog seem comfortable wearing it?
If the answer is yes, you are probably in the right place.
Our take
At Fur Sie, we believe a dog collar should look good, but it should also feel good.
Our collars are designed for everyday wear: adjustable, comfortable, machine washable, made with vegan materials, and finished with secure hardware.
Because your dog wears one thing every day.
It should fit properly.
