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High wearing comfort thanks to thick padding
Easy leashing & unleashing thanks to back D-ring
Important note:
The sizes of the Forest dog harness differ from the standard size chart and are listed separately below this size chart.
Chest circumference
Belly bar Length
Width Nylon strap
Size XS
A: 46cm-63cm | B: 13.5cm | C: 1.5cm
Suitable for*: Bolonka Zwetna, Chihuahua (from approx. 3 kg), Havanese, Maltese, Miniature Dachshund, Papillon, Pomeranian, Toy Poodle, Yorkshire Terrier, Miniature Pinscher, Miniature Poodle, Miniature Spitz
Size S
A: 54cm-76cm | B: 16.5cm | C: 2cm
Suitable for*: Cavalier King Charles Spaniel, Cocker Spaniel, Dachshund, Fox Terrier, French Bulldog, Large Poodle, Jack Russell Terrier, Lagotto Romagnolo, Pug, Parson Russell Terrier, Shih Tzu, Welsh Corgi Pembroke, West Highland White Terrier, Miniature Poodle, small mongrels up to approx. 10-12 kg
Size M
A: 61cm - 83cm | B: 22.5cm | C: 2.5cm
Suitable for*: Australian Shepherd, Beagle, Bernese Mountain Dog, Border Collie, Dalmatian (gentle), German Quailhound, English Springer Spaniel, Flat Coated Retriever, Goldendoodle, Husky, Kooikerhondje, Malinois, Nova Scotia Duck Tolling Retriever, Portuguese Water Dog, Samoyed, Shetland Sheepdog, Vizsla
Size L/XL
A: 69cm - 95cm | B: 26.5cm | C: 2.5cm
Suitable for*: Akita Inu, Alaskan Malamute, Amstaff, Belgian Shepherd, Saint Bernard, Cane Corso, Dalmatian (strong), Great Dane, German Shepherd, Doberman, Gordon Setter, Golden Retriever, Irish Setter, Kuvasz, Labrador Retriever, Leonberger, Pyrenean Mountain Dog, Rhodesian Ridgeback, Rottweiler, Weimaraner, larger mixed breeds from approx. 25 kg
*Important note: There may be differences in build within the same breed. The breed recommendation is for guidance only and is not a guarantee. To determine the right size, we always recommend measuring the chest circumference.
Size XS
A: 35-48 cm | B: 12 cm | C: 1.5 cm
Recommended dog weight: approx. 3-6 kg
Size S
A: 46-63 cm | B: 19 cm | C: 1.5 cm
Recommended dog weight: approx. 5-12 kg
Size M
A: 54-76 cm | B: 22 cm | C: 2 cm
Size L
A: 61-85 cm | B: 28 cm | C: 2.5 cm
Size XL
A: 69-100 cm | B: 33 cm | C: 2.5 cm
The collars in the Apex collection are infinitely adjustable thanks to the slider.
Size XXS/XS
Neck circumference: 22-32cm
Width: 1.5cm
Suitable for: Yorkshire Terrier, Maltese, Toy Poodle, Papillon
Size S/M
Neck circumference: 28 cm-44 cm
Width: 2cm
Suitable for: French Bulldog, Cocker Spaniel, Shiba Inu, Miniature Schnauzer
Size M/L
Neck circumference: 36 cm-52 cm
Width: 2.5 cm
Suitable for: Border Collie, Golden Retriever (young animals), Australian Shepherd, Dalmatian
Size L/XL
Neck circumference: 46 cm-68 cm
Width: 3cm
Suitable for: German Shepherd, Rottweiler, Labrador Retriever, St. Bernard
The leash is available in two versions:
Standard (width: 20mm) recommended for:
Collars: XXS/XS, S/M and M/L
Harnesses: XS, S and M
Extra wide (width: 25mm) recommended for
Collars: L/XL
Harnesses: L/XL
In principle, however, both variants are compatible with all sizes, so you can choose them according to your personal preferences.
The leashes have a total length of 230 cm, are 3-way adjustable and have two carabiners, two D-rings and an O-ring. This means they can be adjusted to three different lengths and can be used flexibly:

Do you already know all the advantages
Why you and your four-legged friend will love the Apex Set
We have analyzed over 100,000 product reviews, surveyed over 20,000 customers, and conducted 50 long-term tests. We identified and solved the following problems:
Perfectly matched for
4 different sizes. Extra small and large fittings. Fits perfectly. Whether small poodle or Ridgeback.


Painful chafing, sharp edges, and no padding? Not with the William Walker harness.

Soft neoprene
Adapts to every movement and prevents chafing.
Super soft padding
For maximum
comfort without pressure points.
Breathable mesh
Promotes air circulation in the chest and neck area.
As comfortable as your favorite leggings.
Don’t trust us, trust:
Over 50,000 happy customers

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