Dog and Cat Collars and ID Tags (2026)

Setting up a first collar, or replacing one that slips, rubs or jingles, starts with the collar type. Below: what each type is for, how the fit is described by the people who publish fit advice, and which tags and silencers are worth buying.

How we chose: we did not test these collars or tags; we read the makers' listings and sizing notes and kept products sold by the brand's own Amazon store that were in stock on September 28, 2026.

Collars and tags side by side

Prices are Amazon's, as of the time shown, and subject to change. Details

Tag, microchip, or both?

Both. The two do different jobs.

The American Veterinary Medical Association's page on how microchips reunite pets with families explains that a chip holds only "a unique identification number," read by a scanner. It has no power source and cannot show where your pet is.

The AVMA says microchips "significantly improve the chances of lost pets being reunited with their owners," but also that "it's best for microchipped pets also to wear a collar with current identification, like a license tag, rabies tag, and personalized ID tag."

A tag works the moment a neighbor picks up your dog; a chip works once someone takes the pet to a vet or shelter with a scanner. That is why you want both.

The chip is only as good as its registration. The AVMA says owners "must register the microchip and keep their contact information current in the associated registry," and that if the details are outdated, "a lost pet might not be returned to their owner even after the microchip is scanned."

If you do not know which registry your pet's chip uses, the same page points to the American Animal Hospital Association's lookup tool, or your vet can scan the chip to read its number. Ask your vet to scan it at routine checkups too, which the AVMA suggests, to confirm it still reads.

A GPS tracker is a third, separate thing: a powered device that reports location over a cell network. See our guide to GPS pet trackers for how those differ from tags and from Bluetooth item finders. A registered chip can also open a microchip pet door; our microchip pet door guide covers which chips each door reads.

What to put on the tag

Keep it short and useful: your phone number first, a second number, and the pet's name if you like. The GoTags stainless tag has room for four lines on each side, so a backup number and "microchipped" fit on the back. The small 1 in size is the one GoTags suggests for cats and small dogs.

Metal tags clink. There are three ways around that:

• A slide-on silicone tag, like the GoTags Silent Tag, sits flat on the collar. Buy the size that matches the collar width: GoTags lists small for 3/8 in collars (typical for cats), medium for 5/8 in and large for 3/4 to 1 in.
• A silencer sleeve such as the GoTags bone silencer wraps around a metal tag you already have.
• A collar with a silencer built in: the Ruffwear Front Range has a silicone tag silencer and a separate ID attachment point.

Your dog's license and rabies tag still go on the collar. They are issued by your city or county and your vet, not a tag shop.

Cats: why the buckle should break away

A cat collar should open on its own if it catches. The Animal Medical Center in New York, a nonprofit veterinary hospital, explains in a post on breakaway collars for cats that a cat's collar "can easily catch on fences, sticks or other protruding objects," and that a cat can get a leg or its lower jaw caught trying to escape a collar.

"Breakaway collars pop off with only a little bit of pressure on them and release the tethered cat. Breakaway collars save cat lives." The same post says a breakaway collar with a tag carrying your phone number is better than no collar at all, because it helps identify a lost cat.

A tracker company says the same. Tractive's help page on attaching its trackers tells owners to "always use a breakaway collar for cats," and ships its CAT Mini tracker with a Rogz safety collar.

The Rogz Reflective Cat Collar lets you set how easily it opens: Rogz lists settings for cats of about 6.6, 8.8 and 11 lb and up. The Blueberry Pet 2-Pack is a simpler breakaway collar with a bell and bow tie; the second collar is a spare for the day the first one pops off in the garden.

Key point: do not clip a leash to a breakaway collar. The Animal Medical Center notes that if a pet bolts while a breakaway collar is clipped to the leash, the collar will not hold, and says a breakaway collar might not be the best idea for a cat you walk on a leash. Walk a cat in a harness instead; see our guide to escape-proof cat harnesses.

How tight should a collar be?

Two published sources describe the same check. The Animal Medical Center's post says to buy a cat collar that fits "with room for two fingers to fit between the collar and your cat's neck," and to look under the collar for a rash after the first few days.

Fi, which sells GPS dog collars, says on its collar sizing page that at the correct size "the collar should allow you to fit two fingers between it and your dog's neck," and that if you are measuring a bare neck you should add 1 to 3 inches, depending on the dog's size.

Recheck a puppy's or kitten's collar often, since they outgrow a setting quickly. For a new puppy, our new puppy checklist covers the collar and tag alongside everything else for day one, and the new kitten checklist does the same for cats.

Dogs: flat buckle collar or martingale?

For most dogs, a flat buckle collar is the tag carrier. The Blueberry Pet Essentials is plain nylon with a steel D-ring; the Ruffwear Front Range adds a side-release buckle, an aluminum V-ring and the built-in silencer. Blueberry Pet's listing says the collar is not for tie-out.

A martingale is different. It has no buckle: a second, smaller loop tightens when the leash pulls, but only as far as the loop allows. Blueberry Pet's listing for its Essentials martingale says the design is meant for sighthounds but has become popular with other breeds, that it gives "more control over the dogs without the choking effect of a slip collar," and that it is "great for preventing escape."

It also warns the collar is not for tie-out and that you should "never leave your dog unattended with a collar on." Because it slips over the head, you size it by measuring the head as well as the neck.

Ruffwear sells a martingale too, the Chain Reaction; its Amazon listing says the design "prevents backing out."

If your dog pulls on walks, a collar of any kind is the wrong tool for the leash. A front-clip harness takes the leash load on the chest; our guide to no-pull dog harnesses compares five, and our leash guide covers the leash itself, from a plain 6 ft leash to a long line. Keep the collar on for the tags.

If a collar rubs, causes hair loss or a rash, or your dog has a neck or breathing problem, ask your vet what to use. This page is not veterinary advice (more on that).

Related: for winter walks, our winter dog coat guide covers which dogs need a coat and how to measure for one.

What we left out

Red Dingo engraved tags were sold on Amazon by DogTuff and PupLife Dog Supplies rather than a Red Dingo store, and Quiet Spot tag silencers by a seller called PetHarmony, so neither met our seller rule. The SightHound Gang martingales were sold by their own store but showed low stock, and Blueberry Pet's covered the same design. We found no FDA or CPSC recall for any brand on this page in our pet product recall list.

Frequently Asked Questions

Should an indoor cat wear a collar?

Yes, because indoor cats do get out. The Animal Medical Center says "a collar with ID, in combination with a microchip, offers the best chances of being reunited with your cat."

Can a dog wear a breakaway collar?

The Animal Medical Center says breakaway collars are not for dogs: one would not give you control on a walk or hold if the dog tried to get away. Use a buckle collar for the tags.

Does a cat's flea collar need to break away too?

Yes. The Animal Medical Center's breakaway collar post says that if your cat wears a flea collar, it should also be a breakaway style.

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PetProofLab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Sizes and features are the makers' own, from their listings. This guide is general information, not veterinary advice.