Puppy Collars, Harnesses and Leashes: How to Choose

By Tailwisp Editorial TeamUpdated October 17, 20263 min read

Collars, harnesses and leashes are your puppy's first connection to the outside world. A good fit makes walks comfortable and safe, while poor equipment can cause discomfort, escape attempts and bad habits. Here is what to know before you buy.

Collars

Flat collars

A flat buckle or snap collar is the standard choice for ID tags. Choose a lightweight one in nylon or soft leather, sized for a puppy and adjustable. Check the fit often, and replace it as your puppy grows.

Breakaway collars

Some collars have a safety release that opens under strain, which can prevent choking if the collar snags. They are useful for puppies who are left with collars on in crates or play areas, but they are not suitable for walking on a leash.

Collars to avoid for young puppies

• Choke chains and prong collars can cause injury and are not appropriate for puppies.
• Shock collars are unsuitable for young puppies and can cause fear and stress.
• Heavy collars can strain developing necks.

Harnesses

A well-fitted harness spreads pressure across the chest and shoulders, which avoids strain on the neck and trachea. It is a good choice for small breeds, flat-faced breeds and puppies learning to walk on a leash.

• Back-clip harnesses are easy to put on and comfortable, but may encourage pulling in some dogs.
• Front-clip harnesses reduce pulling by turning the dog toward you. See our guide to harnesses for dogs that pull.
• Step-in harnesses are easy to put on for squirmy puppies.
• Dual-clip harnesses offer both options.

Choose a harness that does not restrict shoulder movement or rub under the legs, and check the fit regularly.

Getting the fit right

• Measure your puppy's neck, chest and girth, and use the manufacturer's size chart.
• Two-finger rule. You should be able to fit two fingers between the collar or harness and the body.
• Check for chafing, especially behind the front legs.
• Adjust as your puppy grows. A collar that fits today may be too small in a couple of weeks.
• Do not leave the harness on all day, unless it is designed for that, since it can cause rubbing.

Leashes

Standard leashes

A four- to six-foot leash made of nylon, cotton or leather is best for training. It gives you control without being too long. Choose a comfortable handle and a secure clip.

Long lines

A longer line of 15 to 30 feet is useful for recall practice in safe areas. Use it with a harness, not a collar, and handle it carefully to avoid rope burn.

Retractable leashes

These are best avoided for puppies, because they encourage pulling, give less control and can cause injuries. Sudden extension can startle a puppy.

Hands-free leashes

Useful for jogging or hiking with a dog that is already trained, but not ideal for training a puppy.

ID and safety

• ID tag. Include your phone number and a second contact if possible.
• Microchip. Make sure it is registered with up-to-date details.
• Reflective or light-up gear for walking after dark.

Introducing gear

Many puppies dislike wearing a collar or harness at first. Go slowly:

1. Let the puppy sniff the gear.
2. Put it on for short periods while playing or feeding.
3. Reward calm behavior.
4. Add the leash, letting the puppy drag it in a safe area under supervision.
5. Begin short, positive walks.

Our guide to introducing a puppy to a leash and collar explains the steps in more detail.

Common mistakes

• Using a collar that is too tight or too loose
• Failing to check fit as the puppy grows
• Pulling or jerking the leash
• Using a retractable leash in busy areas
• Forgetting an ID tag

What to buy first

A flat collar with an ID tag, a comfortable harness and a standard leash are enough to start. As your puppy grows, you can add specialized gear. See our puppy shopping list for other essentials.

The takeaway

Choose gentle, well-fitting gear, check it often and introduce it patiently. Good equipment makes walks enjoyable and safe for both of you.