What Size Seresto Collar for 20 LB Dog – Optimal Sizing

What Size Seresto Collar for 20 LB Dog

After trying different sizes, I discovered that the specific Seresto collar size designed for 20 lb dogs is the secret to maximum protection and a happy pup!

For a 20 lb dog, the recommended size of a Seresto collar is a small size. The Seresto collar is designed to fit dogs with neck circumferences up to 14 inches. It is suitable for dogs weighing between 7 and 18 pounds. It is important to choose the appropriate size to ensure a proper and comfortable fit for your dog while providing effective flea and tick protection.

Discover the ultimate defense for your 20 lb dog’s well-being. We’ll guide you through understanding what size seresto collar for 20 lb dog and help you pick the right one for your beloved pet.

What size seresto collar for 20 lb dog – Choosing the correct size

When it comes to selecting the correct Seresto collar size for a 20 lb dog, pet owners need to keep in mind that choosing the right fit is crucial. An ill-fitting collar can cause discomfort and even injury if it’s too tight or too loose.

To ensure you get the right size, measure your dog’s neck with a tape measure and add an inch to allow room for comfort. Seresto collars come in two sizes: small/medium (fits necks up to 15 inches) and large (fits necks up to 27 inches).

For a 20 lb dog, both collar sizes may seem suitable at first glance. However, it’s important to choose the appropriate size based on your dog’s neck measurement rather than their weight alone.

Choosing the correct Seresto collar size will also determine how effective flea control will be for your furry friend. A properly fitting collar around your pup’s neck ensures that they are protected from fleas and ticks as well as repels and kills them for eight months.

By correctly putting on a Seresto dog control collar around your puppy’s neck. Wearing this product should provide long-lasting flea protection against all stages of fleas including eggs. Which allows you peace of mind while enjoying outdoor activities with them!

Understanding Seresto collar sizes

Seresto flea and tick collars come in different sizes to cater to the size of your furry friend. The collar’s size is essential as it determines how well the active ingredients will work on your dog.

Seresto dog collar sizes range from small dogs weighing up to 18 lbs, medium-sized dogs weighing between 18-26 lbs, large dogs weighing between 26-44 lbs, and extra-large dogs that weigh above 44 pounds.

When choosing a Seresto collar for dogs, you need to consider his weight and measure his neck circumference accurately. To do this, use a measuring tape or string around the base of your dog’s neck and add two fingers width allowance for comfort.

It’s crucial not to choose a larger collar than recommended as it won’t fit correctly around your pet’s neck. On the other hand, if you select a smaller one, it may choke or cause discomfort to your pet.

Understanding Seresto collar sizes is vital in ensuring that you’re providing proper flea or tick control for your beloved companion without compromising their comfort.

The Seresto® collar is resistant to water and maintains its effectiveness even after shampooing, swimming, or exposure to rain or sunlight. Under normal conditions, effectiveness lasts for 8 months.

Recommended Seresto collar size for large dogs

When it comes to tick collars for large dogs, choosing the right Seresto flea and tick collar size is crucial. These collars are available in two sizes: small/medium for dogs under 18 pounds and large for dogs over 18 lbs. But what size should you choose for a large breed dog?

For a 20 lb dog, we recommend that you use the larger Seresto collar designed for dogs that swim and are over 18 lbs. This will provide your pup with optimal protection against fleas and ticks.

It’s important to note that the Seresto collar is designed to be adjustable, so even if it seems too big at first, you can adjust it accordingly to fit snugly around your dog’s neck.

The great thing about the Seresto flea and tick collar is its long-lasting effectiveness. The collar releases two active ingredients that repel and kill fleas and ticks on contact. And unlike other flea collars that only last a few weeks or months. This one lasts up to eight months!

Putting the collar on your furry friend is easy too – simply place it around their neck like any other regular collar they might wear.

When selecting a Seresto flea and tick control product for your large doggo make sure that you choose the appropriate size so they receive full protection from these pesky parasites!

Can I cut a large Seresto collar in half?

It is not recommended to cut a large Seresto collar in half. This collar is designed to provide eight months of continuous protection against ticks and fleas. It is important to use the collar as instructed to ensure maximum effectiveness.

If the collar is too large for your pet, it is recommended to remove the collar and purchase the correct size for your pet. It is important to remember that the Seresto collar is a non-greasy collar that provides a convenient and long-lasting solution for protecting your pet against ticks and fleas.

Cutting the collar in half may reduce its effectiveness and may not provide adequate protection against these parasites. To ensure the safety and health of your pet. While using the seresto collar it is important to follow the instructions provided by the manufacturer. In case of any confusion or concerns, it is always best to consult a veterinarian who can provide expert advice. 


Selecting the correct Seresto collar size for a 20 lb dog is crucial in ensuring effective flea and tick control. It is essential to measure your dog’s neck circumference before purchasing the collar to ensure it fits correctly and comfortably. The recommended Seresto collar size for large dogs will not be suitable for small dogs or puppies, as it may cause discomfort or even harm.

Remember that the Seresto flea and tick collar comes with two active ingredients that repel and kill pests effectively. This means you won’t need additional treatments during those eight months of wearing the collar around your pet’s neck.

If you’re looking for a long-lasting solution to keep fleas and ticks away from your furry friend, investing in a Seresto flea and tick collar is an excellent decision. Not only does it provide continuous protection from ticks for 8 months. But it also saves you money on frequent vet visits or buying separate treatments every month. So put the collar on your dog today knowing they are protected for up to 8 months!


Can I bathe my dog with Seresto collar on?

Yes, you can bathe your dog with the Seresto collar on. The collar is waterproof and will not be affected by water after fitting. However, it is recommended to wait for 48 hours after the initial application before bathing or submerging the collar in water. 

What active ingredients are stored within the collar?

The active ingredients stored within the tick collar for dogs vary depending on the type of collar and its intended purpose. However, common active ingredients include insecticides such as imidacloprid, permethrin, and deltamethrin, which repel and kill flea larvae, ticks, and other pests. 

What size Seresto collar should I get?

To determine the appropriate size for your pet’s Seresto collar, it is important to measure your pet’s neck first. You can do this by using a measuring tape, ensuring that you can fit at least two fingers between the tape and your pet’s neck. 

Want to know what customers are saying about the Seresto flea collar?

If you’re curious to find out the opinions of customers regarding the Seresto flea collar, you can check out topical reviews online. Many pet owners have shared their experiences with the product and their overall satisfaction. 

Do you have to wash your hands after touching a Seresto collar?

It is recommended to wash your hands after the application of the collar and whenever you come in contact with it, but it is not necessary. Seresto collars are designed to be safe for pets and humans, and the active ingredients are embedded in the collar. 

Similar Posts