How to Choose a Leash, Harness, Collar or Pet Carrier: Buying Guide

This guide is for dog and cat owners choosing gear for walks and trips: collars, leashes, harnesses, car seat covers and pet carriers. It covers how to measure and fit, what each type of gear is good at, how to think about car safety, and how to pick and introduce a carrier.

The short answer: measure before you buy, and check fit with the two-finger rule. A flat collar is for ID tags, a standard 6 foot leash is the everyday choice, and a harness with a front ring helps with pulling while you train. In the car, a seat cover protects the seat but does not protect your pet, so plan a restraint separately. For cats and small dogs, a carrier with more than one opening makes trips easier.

How we chose: picks are based on brand specs, the product listing and public reviews from named outlets linked on each product page. We have not tested these products ourselves.

How to choose walk and travel gear

Measure your dog first

Measure with your dog standing naturally. For a collar, measure around the neck where the collar will sit. For a harness, you need the neck and the chest girth, taken around the widest part of the rib cage just behind the front legs. The AKC suggests keeping two fingers under the tape as you measure so the gear ends up with the same gap, and going up a size when your dog falls between two (AKC).

Then check the brand’s size chart against those numbers. Charts differ a lot from brand to brand, and a “Large” in one line can fit very differently from a “Large” in another.

Collars: for ID, not for control

A flat collar’s main job is to carry ID and license tags. Once it is on, you should be able to slide two fingers easily between the collar and your dog’s neck (AKC). Recheck the fit every few weeks on a growing puppy.

A flat collar is a poor attachment point for a dog that pulls, since steady pressure lands on the neck. Narrow-headed dogs can also back out of a flat collar. For those dogs, clip the leash to a harness and leave the collar on for tags. Take the collar off for unsupervised crate time so it cannot snag on wire.

Leashes: length, grip and visibility

Standard flat leashes are usually nylon, 4 to 6 feet long, and the AKC describes them as inexpensive, strong, waterproof and washable (AKC). For most walks, that is all you need. Handle comfort varies: some people prefer leather, others padded nylon or neoprene grips. If you walk near roads after dark, reflective material helps drivers see you (AKC).

Retractable leashes can extend up to about 30 feet, but the AKC lists several risks: the more a dog pulls, the more line it gets, a dog hitting the end at speed can injure its neck or spine, thin cords can burn or cut skin, and a dropped handle can scare a dog into running. It recommends a standard 6 foot leash at the vet, in pet stores, in crowds, around other dogs and on busy sidewalks (AKC). A leash with an extra handle near the clasp gives you a quick way to shorten up in those places without wrapping the leash around your hand.

Harnesses: back clip, front clip or both

A back-clip harness keeps pressure off the neck and is comfortable for dogs that already walk politely. A front-clip harness attaches at the chest, so when the dog pulls it is turned back toward you, which makes it a common training tool for pullers. Some harnesses offer both. A no-pull harness makes pulling less effective, but it does not teach loose-leash walking by itself, so pair it with training.

Fit matters more than features. Straps that sit across the front of the shoulders can limit how a dog moves its front legs, so a harness like that is better kept for walks than for running or hiking. Check under the front legs for rubbing during the first few walks, and use the two-finger check on every strap.

Car travel: covers versus restraints

A back seat cover or hammock protects upholstery from hair, mud and claws, and a hammock style also blocks the footwell so a dog cannot slide down. Look for a waterproof layer, a non-slip backing, openings for seat belts, and a split design if you fold part of the seat. A cover does not keep your dog safe in a crash, though.

Consumer Reports notes that an unrestrained 60 pound dog in a 35 mph crash can become a 2,700 pound projectile. It also points out that there are no government or industry standards for pet restraints, so many “crash-tested” claims rest only on the maker’s own data. The nonprofit Center for Pet Safety runs independent tests with crash dummy dogs, and only a handful of harnesses, carriers and crates have earned its certification (Consumer Reports). If car safety is the goal, look for a product with that independent certification, and keep pets out of the front seat and away from open windows.

Carriers for cats and small dogs

Size the carrier by your pet’s length and height first, then confirm the weight limit. Your pet should be able to stand, turn around and lie down. If you plan to fly, check the airline’s size limits and pet rules before you book, since they differ by airline. Soft carriers with a flexible frame can squeeze under a plane seat, while hard-sided carriers are easier to clean and stand up better in a car.

For cats, the Michigan Humane Society’s vet advice is to choose a carrier that opens from both the front and the top, ideally with a top half that comes off so a nervous cat can stay in the bottom during an exam (Michigan Humane). It also recommends getting your cat used to the carrier well before you need it: leave it out where your cat spends time with a soft blanket inside, move treats closer and then inside, close the door for a few moments with treats and praise, and then try short car rides (Michigan Humane). A carrier with a top door and a side door works on the same idea, even if the top does not come off.

Cleaning and wear

Nylon collars and leashes can usually be wiped or hand washed, but they dry slowly. Check stitching, clasps and buckles regularly, and replace gear that shows fraying or a loose clasp. Seat covers and carrier liners that go in the washing machine are much easier to live with after a muddy hike or a car-sick cat.

Our picks

2 Hounds Design Freedom No-Pull Harness and Leash Set, 1″ Large

For dogs that pull and owners working on leash manners. It has a front chest ring for steering plus a back martingale loop that tightens gently when the dog pulls, with velvet lining on the strap behind the front legs. The 1 inch Large fits a 28 to 32 inch chest. The chest strap crosses the shoulders, so it is better for walks than for running or hiking.

Max and Neo Triple Handle Reflective Dog Leash, 6 ft

For walking strong dogs in traffic or crowds. This 6 foot, 1 inch nylon leash has three padded handles (18 inches from the clasp, 44 inches from the clasp and at the end), reflective stitching on both sides and an extra D-ring for waste bags. It is heavier than a basic leash and can feel bulky with a small dog.

Blueberry Pet Essentials Classic Solid Nylon Dog Collar, Small

For an everyday collar to carry tags on a small dog or puppy. The Small fits a 12 to 16 inch neck, is 5/8 inch wide, and has nylon webbing, a side-release buckle made from recycled plastic and a chromed steel D-ring. It has no separate tag ring, nylon can fray, and like any flat collar it is not escape proof for narrow-headed dogs.

4Knines Heavy-Duty Rear Seat Cover with Hammock, Regular

For keeping the back seat clean on car trips with a dog. The Regular is 54 inches wide for cars and compact SUVs, with a waterproof laminate, a non-slip backing, access to all three seat belts and a split design for 60/40 or 50/50 seats. The seams are not watertight, 4Knines says not to use it with heated seats on, and it is not a restraint.

Sherpa Original Deluxe Travel Pet Carrier, Medium

For cats and small dogs that fly or ride in the car. A spring wire frame lets the back compress to fit under airplane seats, it has top and side entries, locking zippers, a waterproof base and a washable faux lambskin liner. The Medium fits pets up to about 16 inches long and 16 lbs. It is not crash tested and runs small, so larger cats may need the Large.

Ruffwear Front Range Dog Harness

A padded everyday harness with both a back ring and a front chest clip, so you can switch to front-clip control on walks where your dog pulls. Two leash points: an aluminum V-ring on the back and reinforced webbing on the chest for front-clip walking. Five sizes covering chest girths from 13 to 42 in. One trade-off: bulkier than strap-only harnesses.

rabbitgoo Classic Fit No-Pull Dog Harness with Front and Back Clips

A budget vest harness with a front ring for pullers, a back ring for easy walks, a top handle and reflective strips. Front ring to redirect pulling and a back D-ring for casual walks. Top handle for extra control and lifting help over obstacles or into the car. One trade-off: polyester instead of nylon.

Fable Magic Link Hands-Free Dog Leash

One cord leash that adjusts in length and can be worn as a waist belt, cross-body or wrist strap, so you can walk a calm dog with both hands free. Can be worn as a belt, a cross-body bandolier or a wrist strap, or held as a regular leash. Clips to a collar or harness, or forms a slip loop around the neck. One trade-off: not for dogs that pull or lunge.

TUG 360 Tangle-Free Retractable Dog Leash, 16 ft Tape

A tape-style retractable leash whose housing lets the tape swivel around you, so a sniffing dog can circle without tangling, with a one-thumb brake and lock. 360 degree tangle-free design lets the tape rotate as your dog moves around you. Flat tape rather than a thin cord, with a thumb button to brake, pause and lock. One trade-off: retractable leashes give less control than a fixed leash.

EzyDog Neo Classic Wide Neoprene Dog Collar (large dogs)

A wide, neoprene-lined collar for big dogs that spreads pressure over more of the neck and dries fast after swims and rain. Lined with waterproof, easy-to-clean neoprene. Neoprene is reinforced with nylon webbing for strength. One trade-off: only sized for large and giant dogs.

Ruffwear Front Range Dog Collar

A simple, well-made everyday collar with an aluminum leash ring, a separate tag ring and a tag silencer, in sizes from small to large dogs. Three sizes for necks from 11 to 26 in, 0.75 in wide for the smallest and 1 in wide for the others. Anodized aluminum V-ring for the leash plus a separate ID attachment point with a Quick Ring for tags. One trade-off: smallest size starts at 11 in, too big for some toy breeds.

Mountainsmith K-9 Dog Pack

A harness with two saddlebag pockets so a fit, medium to large dog can carry its own water, bags and snacks on hikes, with a grab handle on top. Three sizes: Small for dogs 20 to 50 lbs, Medium 40 to 90 lbs, Large 80 lbs and up. Two pannier pockets with zippered accessory pockets, about 3, 5 or 9 liters each by size. One trade-off: bulky for everyday neighborhood walks.

Mistakes to avoid

• Guessing the size instead of measuring neck and chest girth.
• Clipping the leash to a flat collar on a dog that pulls hard.
• Using a retractable leash on a dog that has not learned to walk on a loose leash, or in crowds and at the vet.
• Expecting a no-pull harness to fix pulling without any training.
• Treating a seat cover or a basic carrier as crash protection.
• Bringing out the cat carrier only on vet day.
• Booking a flight before checking the airline’s carrier size limits.

FAQ

Is a harness better than a collar for walking?

For dogs that pull, usually yes, because a harness keeps pressure off the neck. Many owners use both: a collar for ID tags and a harness for the leash.

How tight should a dog collar be?

You should be able to slide two fingers easily between the collar and your dog’s neck. Recheck often while a puppy is growing.

What length leash is best?

A 4 to 6 foot standard leash suits most everyday walks. The AKC recommends a standard 6 foot leash rather than a retractable in crowds, at the vet and on busy sidewalks.

Do front-clip harnesses stop pulling?

They make pulling less effective by turning the dog toward you, but they work best alongside loose-leash training rather than as a permanent fix.

Is a seat cover enough to keep my dog safe in the car?

No. A seat cover protects the car, not the dog. For crash protection, look for a harness, carrier or crate with independent certification from the Center for Pet Safety.

What is the best kind of carrier for a cat?

One that opens from both the top and the front, sized so your cat can stand and turn around. Leave it out at home with bedding and treats so your cat is used to it before trips.

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