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Dog Collar & Harness Sizing

Find the right collar or harness size by breed or by measurement — anchored to neck and chest circumference, with the two-finger safety rule built in. Measure your dog; breed is only a starting point.

Reviewed by the 247Sizing teamLast updated: 12 August 2026

Collar & Harness Calculator

Enter neck or chest size, get the right fit instantly.

Open calculator → Cats

Cat Collar Sizing

Breakaway-safe cat collars by breed and measurement.

Browse cats → Crates

Dog Crate Sizing

The right crate size by breed or by measuring your dog.

Browse crates →

22 cm Dog Neck

A 22 cm neck suits a XS collar.

24 cm Dog Neck

A 24 cm neck suits a XS collar.

26 cm Dog Neck

A 26 cm neck suits a XS collar.

28 cm Dog Neck

A 28 cm neck suits a S collar.

30 cm Dog Neck

A 30 cm neck suits a S collar.

32 cm Dog Neck

A 32 cm neck suits a S collar.

34 cm Dog Neck

A 34 cm neck suits a S collar.

36 cm Dog Neck

A 36 cm neck suits a M collar.

38 cm Dog Neck

A 38 cm neck suits a M collar.

40 cm Dog Neck

A 40 cm neck suits a M collar.

42 cm Dog Neck

A 42 cm neck suits a M collar.

44 cm Dog Neck

A 44 cm neck suits a M collar.

46 cm Dog Neck

A 46 cm neck suits a L collar.

48 cm Dog Neck

A 48 cm neck suits a L collar.

50 cm Dog Neck

A 50 cm neck suits a L collar.

52 cm Dog Neck

A 52 cm neck suits a L collar.

54 cm Dog Neck

A 54 cm neck suits a L collar.

56 cm Dog Neck

A 56 cm neck suits a XL collar.

58 cm Dog Neck

A 58 cm neck suits a XL collar.

60 cm Dog Neck

A 60 cm neck suits a XL collar.

62 cm Dog Neck

A 62 cm neck suits a XL collar.

64 cm Dog Neck

A 64 cm neck suits a XL collar.

66 cm Dog Neck

A 66 cm neck suits a XXL collar.

68 cm Dog Neck

A 68 cm neck suits a XXL collar.

Chihuahua

Chihuahua collar & harness sizing.

Yorkshire Terrier

Yorkshire Terrier collar & harness sizing.

Pomeranian

Pomeranian collar & harness sizing.

Cavalier King Charles Spaniel

Cavalier King Charles Spaniel collar & harness sizing.

Shih Tzu

Shih Tzu collar & harness sizing.

Dachshund

Dachshund collar & harness sizing.

Miniature Schnauzer

Miniature Schnauzer collar & harness sizing.

Boston Terrier

Boston Terrier collar & harness sizing.

Pug

Pug collar & harness sizing.

French Bulldog

French Bulldog collar & harness sizing.

Beagle

Beagle collar & harness sizing.

Cocker Spaniel

Cocker Spaniel collar & harness sizing.

Whippet

Whippet collar & harness sizing.

Shetland Sheepdog

Shetland Sheepdog collar & harness sizing.

Border Collie

Border Collie collar & harness sizing.

Staffordshire Bull Terrier

Staffordshire Bull Terrier collar & harness sizing.

Australian Shepherd

Australian Shepherd collar & harness sizing.

Standard Poodle

Standard Poodle collar & harness sizing.

Siberian Husky

Siberian Husky collar & harness sizing.

Greyhound

Greyhound collar & harness sizing.

Dalmatian

Dalmatian collar & harness sizing.

Vizsla

Vizsla collar & harness sizing.

Weimaraner

Weimaraner collar & harness sizing.

Labrador Retriever

Labrador Retriever collar & harness sizing.

Golden Retriever

Golden Retriever collar & harness sizing.

Boxer

Boxer collar & harness sizing.

German Shepherd

German Shepherd collar & harness sizing.

Doberman Pinscher

Doberman Pinscher collar & harness sizing.

Rottweiler

Rottweiler collar & harness sizing.

Bernese Mountain Dog

Bernese Mountain Dog collar & harness sizing.

Great Dane

Great Dane collar & harness sizing.

Newfoundland

Newfoundland collar & harness sizing.

Saint Bernard

Saint Bernard collar & harness sizing.

Mastiff

Mastiff collar & harness sizing.

Bulldog

Bulldog collar & harness sizing.

Australian Cattle Dog

Australian Cattle Dog collar & harness sizing.

Maltese

Maltese collar & harness sizing.

Papillon

Papillon collar & harness sizing.

Bichon Frise

Bichon Frise collar & harness sizing.

Havanese

Havanese collar & harness sizing.

Pekingese

Pekingese collar & harness sizing.

Jack Russell Terrier

Jack Russell Terrier collar & harness sizing.

Toy Poodle

Toy Poodle collar & harness sizing.

West Highland White Terrier

West Highland White Terrier collar & harness sizing.

Scottish Terrier

Scottish Terrier collar & harness sizing.

Cairn Terrier

Cairn Terrier collar & harness sizing.

Lhasa Apso

Lhasa Apso collar & harness sizing.

Italian Greyhound

Italian Greyhound collar & harness sizing.

Miniature Pinscher

Miniature Pinscher collar & harness sizing.

Pembroke Welsh Corgi

Pembroke Welsh Corgi collar & harness sizing.

Cardigan Welsh Corgi

Cardigan Welsh Corgi collar & harness sizing.

Basset Hound

Basset Hound collar & harness sizing.

English Springer Spaniel

English Springer Spaniel collar & harness sizing.

Brittany

Brittany collar & harness sizing.

Bull Terrier

Bull Terrier collar & harness sizing.

American Pit Bull Terrier

American Pit Bull Terrier collar & harness sizing.

Chow Chow

Chow Chow collar & harness sizing.

Shar Pei

Shar Pei collar & harness sizing.

Samoyed

Samoyed collar & harness sizing.

Soft Coated Wheaten Terrier

Soft Coated Wheaten Terrier collar & harness sizing.

Keeshond

Keeshond collar & harness sizing.

Portuguese Water Dog

Portuguese Water Dog collar & harness sizing.

Standard Schnauzer

Standard Schnauzer collar & harness sizing.

Airedale Terrier

Airedale Terrier collar & harness sizing.

Irish Setter

Irish Setter collar & harness sizing.

English Setter

English Setter collar & harness sizing.

German Shorthaired Pointer

German Shorthaired Pointer collar & harness sizing.

Rhodesian Ridgeback

Rhodesian Ridgeback collar & harness sizing.

Belgian Malinois

Belgian Malinois collar & harness sizing.

Collie

Collie collar & harness sizing.

Old English Sheepdog

Old English Sheepdog collar & harness sizing.

Flat-Coated Retriever

Flat-Coated Retriever collar & harness sizing.

Chesapeake Bay Retriever

Chesapeake Bay Retriever collar & harness sizing.

Akita

Akita collar & harness sizing.

Alaskan Malamute

Alaskan Malamute collar & harness sizing.

Bloodhound

Bloodhound collar & harness sizing.

Cane Corso

Cane Corso collar & harness sizing.

Bullmastiff

Bullmastiff collar & harness sizing.

Great Pyrenees

Great Pyrenees collar & harness sizing.

Leonberger

Leonberger collar & harness sizing.

Irish Wolfhound

Irish Wolfhound collar & harness sizing.

Borzoi

Borzoi collar & harness sizing.

Anatolian Shepherd

Anatolian Shepherd collar & harness sizing.

Tibetan Mastiff

Tibetan Mastiff collar & harness sizing.

Affenpinscher

Affenpinscher collar & harness sizing.

Bedlington Terrier

Bedlington Terrier collar & harness sizing.

Bichon Bolognese

Bichon Bolognese collar & harness sizing.

Border Terrier

Border Terrier collar & harness sizing.

Brussels Griffon

Brussels Griffon collar & harness sizing.

Chinese Crested

Chinese Crested collar & harness sizing.

Cockapoo

Cockapoo collar & harness sizing.

Coton de Tulear

Coton de Tulear collar & harness sizing.

English Bulldog

English Bulldog collar & harness sizing.

Field Spaniel

Field Spaniel collar & harness sizing.

Finnish Spitz

Finnish Spitz collar & harness sizing.

Fox Terrier

Fox Terrier collar & harness sizing.

Goldendoodle

Goldendoodle collar & harness sizing.

Great Swiss Mountain Dog

Great Swiss Mountain Dog collar & harness sizing.

Havana Silk Dog

Havana Silk Dog collar & harness sizing.

Irish Terrier

Irish Terrier collar & harness sizing.

Japanese Chin

Japanese Chin collar & harness sizing.

Kerry Blue Terrier

Kerry Blue Terrier collar & harness sizing.

Lagotto Romagnolo

Lagotto Romagnolo collar & harness sizing.

Lowchen

Lowchen collar & harness sizing.

Manchester Terrier

Manchester Terrier collar & harness sizing.

Norfolk Terrier

Norfolk Terrier collar & harness sizing.

Norwich Terrier

Norwich Terrier collar & harness sizing.

Nova Scotia Duck Tolling Retriever

Nova Scotia Duck Tolling Retriever collar & harness sizing.

Pharaoh Hound

Pharaoh Hound collar & harness sizing.

Plott Hound

Plott Hound collar & harness sizing.

Pointer

Pointer collar & harness sizing.

Schipperke

Schipperke collar & harness sizing.

Sealyham Terrier

Sealyham Terrier collar & harness sizing.

Spanish Water Dog

Spanish Water Dog collar & harness sizing.

Spinone Italiano

Spinone Italiano collar & harness sizing.

Sussex Spaniel

Sussex Spaniel collar & harness sizing.

Tibetan Terrier

Tibetan Terrier collar & harness sizing.

Welsh Terrier

Welsh Terrier collar & harness sizing.

Wirehaired Pointing Griffon

Wirehaired Pointing Griffon collar & harness sizing.

Xoloitzcuintli

Xoloitzcuintli collar & harness sizing.