DOG SIZE GUIDES
The measurements state the minimum - maximum the collar can be adjusted to. This is the smallest to largest the collar can be adjusted to and from. If your dog fits into two sizes, pick the one they are mostly within.
Example: your dog with 2 finger width space measures at 42cm, you therefore fit in a size Small and a size Medium, but you’re mostly within the Medium measurement so we’d recommend that size, particularly if your dog is a growing puppy!
Collar Size by Dog Breed examples:
Here are some of the sizes our customers wear. Please note this is a guide only and all dogs will vary depending on age and size, even if the same breed, so please always measure to find the correct size for your dog.
Extra Small: Mini Dachshund, Maltese, Maltipoo, Chihuahua, Toy Terrier, Italian Greyhound and most small breed puppies.
Small: Mini Dachshund, Cockapoo, Cavapoo, Westipoo, Jack Russell, Bichon, Mini Schnauzer, Poodle, Pug Puppy, Frenchie Puppy and most medium+ puppies.
Medium: French Bulldog, Cocker Spaniel, Border Collie, Pug, Beagle, Puggle, Shiba Inu
Large: French Bulldog, German Shepherd, Golden Retriever, Labrador, Husky, Rottweiler, English Bulldog. 
The measurements state the minimum - maximum the 3-CLICK TOUGH HARNESS can be adjusted to at each point. This is the smallest to largest the harness can be adjusted to and from. If your dog fits into two sizes, pick the one they are mostly within.
Example: your dog with 2 finger width space measures A: 36cm B: 50cm C: 19cm you therefore fit in a size XS and S, but you’re at the very edge of an XS and mostly within the S measurement so we’d recommend that size, particularly if your dog is a growing puppy!
Breed examples:
Here are some of the sizes our customers wear. Please note this is a guide only and all dogs will vary depending on age and size, even if the same breed, so please always measure to find the correct size for your dog.
Extra Small - Mini Dachshund, Chihuahua, Yorkie, Maltipoo, Toy Breeds / some puppies
Small - Mini Dachshund, Jack Russell, Pug, Cockapoo, Shih Tzu, Mini Schnauzer
Medium - Spaniels, Corgi, French Bulldog, Staffordshire Bull Terrier, English Bull Terrier, Puggle, Border Terrier
Large - German Shepherd, Labrador, Husky, Hungarian Vizsla
X-Large - Husky, Golden Retriever, Dalmatian, Bernese, Malamute, Pointer
ADJUSTABLE STYLE HARNESS
PLEASE USE THIS SIZE GUIDE FOR BREED COLLECTION ADJUSTABLE HARNESSES ONLY:
The measurements above state the measurements of the harness. This is the min - max circumference of the adjustable neck (A), the min - max circumference of the adjustable chest (B), and the length of the harness body (C).
These measurements are the smallest and largest you can adjust the harness to at the neck and the chest. Please allow a 2 finger width room inside of your measurement at points A + B to find your size - remember your dog needs to fit inside of the harness so allow that 2 finger width space! You also want to ensure the harness is long enough in the body so ensure your measurement does not mean that harness is too short in the body i.e too close to the "armpit" area.
For example - you've measured your dog and your measurements are:
A - 40cm
B - 54cm
C - 19cm
You fit within the size Small - but you're right at the very edge. You fit comfortably inside of the size Medium. Therefore we would recommend a size Medium.
Breed examples:
Here are some of the sizes our customers wear in our Adjustable Harness style only. Please note this is a guide only and all dogs will vary depending on age and size, even if the same breed, so please always measure to find the correct size for your dog.
Extra Extra Small: Small Breed Puppies, Mini Dachshund, Toy Breeds, Miniature Breeds of Maltese, Yorkie, Maltipoo, Poochon, Brussels Griffon, Cavachon, Shihtzu etc.
Extra Small: Mini Dachshund, Maltese, Yorkie, Maltipoo, Poochon, Brussels Griffon, Cavachon, Shihtzu,
Small: Mini Dachshund, Jack Russell, Bichon, Cockapoo, Yorkie, Cavapoo, Lhasa apso, Pug.
Medium: Corgi, Cockapoo, Westipoo, Standard Dachshund, French Bulldog, Pug, Border Terrier, Cavalier King Charles Spaniel.
Large: French Bulldog, Staffordshire Bull Terrier, English Bull Terrier, Border Collie, Puggle, English Bulldog, Cocker Spaniel.