What Size Harness Does My Dog Need? Breed-Specific Harness Guide Based on Real Customer Trends

What Size Harness Does My Dog Need? Breed-Specific Harness Guide Based on Real Customer Trends

At Pup Chic Boutique, we know that finding the right size harness for your dog can be tricky—especially with so many sizes and styles on the market. That’s why we’ve pulled together this harness sizing guide based on the most common breeds we serve and the sizes that fit them best. This list is based on real customer data and will be updated regularly as we spot new sizing trends across different breeds.

Whether you’re a first-time dog owner or upgrading your pup’s accessories, use this guide to help choose the best size harness for your dog’s breed. We’ve included size recommendations from puppyhood to adulthood to help you plan ahead.

Looking for breed-specific accessories like dachshund harnesses? While other brands focus on one or two breeds, Pup Chic Boutique caters to a wide range of dogs—with inclusive sizing, unique designs, and high-quality materials suitable for all shapes and sizes. You don’t have to shop somewhere else just because your pup is a dachshund—we’ve got you covered. We have harnesses starting at an XXXS up to an XL, and longer body large and XL harnesses for those awkward shaped dogs.

🐾 Harness Sizes by Dog Breed (Based on Real Customers)

Miniature Dachshund

  • Puppy: XXS

  • Adult: XS
    These long-bodied pups fit perfectly in our XXS as puppies, moving up to an XS once fully grown. Our adjustable styles ensure a snug, non-restrictive fit.

Toy Poodle

  • Puppy: XXXS

  • Adult: XXS–XS
    Toy poodles vary in size—some adults remain XXS, while others size up to XS. Puppies are usually tiny enough to start in a XXXS.

Miniature Poodle

  • Puppy: XXS

  • Adult: XS–S
    Miniature poodles can be hard to size due to variance within the breed. We recommend measuring your dog and using our size guide to choose the best fit.

Standard Poodle

  • Adult: Large
    Standard poodles often benefit from our Tactical Harness style, especially if they have a longer torso. The tactical design prevents rubbing under the legs and offers better control.

Cockapoo

  • Puppy: XXS

  • Adult: XS–Large
    Cockapoos come in many shapes and sizes. Our harnesses are adjustable to accommodate their growth and build.

Cavapoo

  • Puppy: XXS

  • Adult: XS
    This small, curly-coated mix fits well in smaller sizes. The XXS is ideal for puppies, and most adults transition to an XS.

Shiba Inu

  • Puppy: XS

  • Adult: Small–Medium
    Shibas fit into a medium in our Tactical Harness, though smaller Shibas may prefer a small in our standard adjustable range.

Labrador

  • Puppy: Small

  • Adult: Large
    Labs are known pullers, so we recommend pairing a large harness with one of our Tuff Stuff designs for strength and comfort.

Husky

  • Puppy: Small

  • Adult: Medium–Large
    Most huskies wear a large harness as adults, but smaller ones may fit better in a medium. Look for harnesses that can handle strength and movement.

Alaskan Malamute

  • Puppy: Medium

  • Adult: XL
    These large, powerful dogs need a durable, comfortable harness. We recommend our Tactical Harness in size XL for adult malamutes.

Rottweiler

  • Puppy: Small

  • Adult: Large
    Rottweilers often fill out quickly, so start with a small and move into a large. Our Tuff Stuff range is great for strong breeds.

Dogue De Bordeaux

  • Adult: Large
    This heavy-set breed fits well in a large, especially in our padded styles designed for comfort and control.

Staffordshire Bull Terrier (Staffie)

  • Puppy: Small

  • Adult: Large
    Staffies are strong and stocky, so we recommend our Tactical Harness in a large for the best fit and support.

Working Cocker Spaniel

  • Puppy: XS

  • Adult: Small
    Lighter-built than show cockers, working cockers fit well in our slimline designs with adjustable chest straps.

Show Cocker Spaniel

  • Puppy: Small

  • Adult: Medium
    These cockers often have a bit more chest depth, so sizing up to medium is common in adults.

Springer Spaniel

  • Puppy: Small

  • Adult: Medium
    Energetic and athletic, Springers benefit from comfortable, durable harnesses with good shoulder room.

Sprocker Spaniel

  • Puppy: Small

  • Adult: Medium
    With traits from both springers and cockers, Sprockers often grow larger than expected. A large harness usually provides the best fit.

French Bulldog

  • Puppy: XS

  • Adult: Medium – Large

Frenchies typically start off in an XS as puppies, but as they grow, most will fit comfortably into a medium harness. That said, some chunkier or broader-chested French Bulldogs may need a large for the best fit. We recommend choosing a style with adjustable chest and neck straps to accommodate their sturdy build and ensure maximum comfort.

Chihuahua

  • Puppy: XXXS

  • Adult: XXXS – Small

Chihuahuas might be tiny, but their sizing can still vary quite a bit. Most start in our XXXS harness—the smallest on the market and specially designed for little pups like Chihuahuas. Many stay in that size throughout adulthood, though slightly larger individuals may move up to an XXS or even a small. Our ultra-lightweight, adjustable designs ensure even the smallest dogs are safe and stylish.

📏 Not Sure Which Size to Pick?

We always recommend measuring your dog’s chest and neck and referring to our size guide for the most accurate fit. Our harnesses are fully adjustable, but choosing the right base size ensures comfort and safety.

If your dog’s breed isn’t listed here, don’t worry—we’re constantly updating this guide as more sizing trends emerge. And you’re always welcome to contact us at hello@pupchic.boutique or message us on social media for advice!

🛍️ Why Choose Pup Chic Boutique?

Unlike brands that only cater to one breed, Pup Chic Boutique creates stylish, practical, and inclusive harnesses for all dogs—big or small, long or tall. Whether you're shopping for a dachshund, a doodle, or a large breed, our harnesses are designed with both form and function in mind.

✅ Adjustable for growing pups
✅ Multiple styles, including Tactical and Tuff Stuff
✅ Sizes from XXXS to XL
✅ Fun, modern designs for every dog and their human

Looking for the perfect harness for your dog? Browse our full range of harnesses here and join thousands of happy UK dog mums who trust Pup Chic Boutique.

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