Size & Fit

Getting the right fit

A properly fitted harness distributes pressure evenly and prevents escape. Here's how to measure and choose the right size for your dog.

Measuring for harnesses

Chest girth: Measure around the widest part of your dog's chest, just behind the front legs

Neck girth: Measure around the base of the neck where a collar would sit

Back length: Measure from the base of the neck to the base of the tail

Use a soft measuring tape and add two fingers of space for comfort. If your dog falls between sizes, size up for comfort.

Where each measurement is taken

The letters in the sizing chart below match the points shown here — A (forebreast), B (chest), C (belly) and D (back).

Where to measure your dog for the Walk System harness: forebreast (A), chest (B), belly (C) and back (D)

Harness sizing chart (in/cm)

Small (S)
• Forebreast (A): 15.7–26.8 in (39.9–68.1 cm)
• Chest (B): 24.4–33.1 in (62.0–84.1 cm)
• Belly (C): 8.3 in (21.1 cm)
• Back (D): 8.5 in (21.6 cm)

Medium (M)
• Forebreast (A): 24.4–31.5 in (62.0–80.0 cm)
• Chest (B): 30.3–39.0 in (77.0–99.1 cm)
• Belly (C): 9.6 in (24.4 cm)
• Back (D): 9.8 in (24.9 cm)

Large (L)
• Forebreast (A): 26.8–41.3 in (68.1–104.9 cm)
• Chest (B): 34.3–45.3 in (87.1–115.1 cm)
• Belly (C): 10.6 in (26.9 cm)
• Back (D): 11.0 in (27.9 cm)

X‑Large (XL)
• Forebreast (A): 29.1–44.1 in (73.9–112.0 cm)
• Chest (B): 36.6–48.0 in (93.0–121.9 cm)
• Belly (C): 11.6 in (29.5 cm)
• Back (D): 12.6 in (32.0 cm)

If your dog is between sizes, choose the larger size for comfort and to reduce rubbing.

Collar included in the set (important)

This is a 3‑piece set (harness + leash + collar).
Set sizing note: If you select Harness size S, the collar included in the set is Collar size M. (For M/L/XL sets, the collar matches the harness size.)

Collar sizing

Measure your dog's neck where the collar sits. You should be able to fit two fingers comfortably between the collar and your dog's neck.

Fit check

After fitting, check that:

The harness sits snug but doesn't restrict movement

You can fit two fingers under all straps

The chest strap sits behind the front legs, not on the shoulders

Your dog can move freely without chafing

Need help? Contact us with your dog's measurements and we'll recommend the right size.

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Size & Fit

Getting the right fit

A properly fitted harness distributes pressure evenly and prevents escape. Here's how to measure and choose the right size for your dog.

Measuring for harnesses

Chest girth: Measure around the widest part of your dog's chest, just behind the front legs

Neck girth: Measure around the base of the neck where a collar would sit

Back length: Measure from the base of the neck to the base of the tail

Use a soft measuring tape and add two fingers of space for comfort. If your dog falls between sizes, size up for comfort.

Where each measurement is taken

The letters in the sizing chart below match the points shown here — A (forebreast), B (chest), C (belly) and D (back).

Harness sizing chart (in/cm)

Small (S)
• Forebreast (A): 15.7–26.8 in (39.9–68.1 cm)
• Chest (B): 24.4–33.1 in (62.0–84.1 cm)
• Belly (C): 8.3 in (21.1 cm)
• Back (D): 8.5 in (21.6 cm)

Medium (M)
• Forebreast (A): 24.4–31.5 in (62.0–80.0 cm)
• Chest (B): 30.3–39.0 in (77.0–99.1 cm)
• Belly (C): 9.6 in (24.4 cm)
• Back (D): 9.8 in (24.9 cm)

Large (L)
• Forebreast (A): 26.8–41.3 in (68.1–104.9 cm)
• Chest (B): 34.3–45.3 in (87.1–115.1 cm)
• Belly (C): 10.6 in (26.9 cm)
• Back (D): 11.0 in (27.9 cm)

X‑Large (XL)
• Forebreast (A): 29.1–44.1 in (73.9–112.0 cm)
• Chest (B): 36.6–48.0 in (93.0–121.9 cm)
• Belly (C): 11.6 in (29.5 cm)
• Back (D): 12.6 in (32.0 cm)

If your dog is between sizes, choose the larger size for comfort and to reduce rubbing.

Collar included in the set (important)

This is a 3‑piece set (harness + leash + collar).
Set sizing note: If you select Harness size S, the collar included in the set is Collar size M. (For M/L/XL sets, the collar matches the harness size.)

Collar sizing

Measure your dog's neck where the collar sits. You should be able to fit two fingers comfortably between the collar and your dog's neck.

Fit check

After fitting, check that:

The harness sits snug but doesn't restrict movement

You can fit two fingers under all straps

The chest strap sits behind the front legs, not on the shoulders

Your dog can move freely without chafing

Need help? Contact us with your dog's measurements and we'll recommend the right size.

Country/region

Size & Fit

Getting the right fit

A properly fitted harness distributes pressure evenly and prevents escape. Here's how to measure and choose the right size for your dog.

Measuring for harnesses

Chest girth: Measure around the widest part of your dog's chest, just behind the front legs

Neck girth: Measure around the base of the neck where a collar would sit

Back length: Measure from the base of the neck to the base of the tail

Use a soft measuring tape and add two fingers of space for comfort. If your dog falls between sizes, size up for comfort.

Where each measurement is taken

The letters in the sizing chart below match the points shown here — A (forebreast), B (chest), C (belly) and D (back).

Harness sizing chart (in/cm)

Small (S)• Forebreast (A): 15.7–26.8 in (39.9–68.1 cm)• Chest (B): 24.4–33.1 in (62.0–84.1 cm)• Belly (C): 8.3 in (21.1 cm)• Back (D): 8.5 in (21.6 cm)

Medium (M)• Forebreast (A): 24.4–31.5 in (62.0–80.0 cm)• Chest (B): 30.3–39.0 in (77.0–99.1 cm)• Belly (C): 9.6 in (24.4 cm)• Back (D): 9.8 in (24.9 cm)

Large (L)• Forebreast (A): 26.8–41.3 in (68.1–104.9 cm)• Chest (B): 34.3–45.3 in (87.1–115.1 cm)• Belly (C): 10.6 in (26.9 cm)• Back (D): 11.0 in (27.9 cm)

X‑Large (XL)• Forebreast (A): 29.1–44.1 in (73.9–112.0 cm)• Chest (B): 36.6–48.0 in (93.0–121.9 cm)• Belly (C): 11.6 in (29.5 cm)• Back (D): 12.6 in (32.0 cm)

If your dog is between sizes, choose the larger size for comfort and to reduce rubbing.

Collar included in the set (important)

This is a 3‑piece set (harness + leash + collar).Set sizing note: If you select Harness size S, the collar included in the set is Collar size M. (For M/L/XL sets, the collar matches the harness size.)

Collar sizing

Measure your dog's neck where the collar sits. You should be able to fit two fingers comfortably between the collar and your dog's neck.

Fit check

After fitting, check that:

The harness sits snug but doesn't restrict movement

You can fit two fingers under all straps

The chest strap sits behind the front legs, not on the shoulders

Your dog can move freely without chafing

Need help? Contact us with your dog's measurements and we'll recommend the right size.

Small (S)
• Forebreast (A): 15.7–26.8 in (39.9–68.1 cm)
• Chest (B): 24.4–33.1 in (62.0–84.1 cm)
• Belly (C): 8.3 in (21.1 cm)
• Back (D): 8.5 in (21.6 cm)

Medium (M)
• Forebreast (A): 24.4–31.5 in (62.0–80.0 cm)
• Chest (B): 30.3–39.0 in (77.0–99.1 cm)
• Belly (C): 9.6 in (24.4 cm)
• Back (D): 9.8 in (24.9 cm)

Large (L)
• Forebreast (A): 26.8–41.3 in (68.1–104.9 cm)
• Chest (B): 34.3–45.3 in (87.1–115.1 cm)
• Belly (C): 10.6 in (26.9 cm)
• Back (D): 11.0 in (27.9 cm)

X‑Large (XL)
• Forebreast (A): 29.1–44.1 in (73.9–112.0 cm)
• Chest (B): 36.6–48.0 in (93.0–121.9 cm)
• Belly (C): 11.6 in (29.5 cm)
• Back (D): 12.6 in (32.0 cm)

This is a 3‑piece set (harness + leash + collar).
Set sizing note: If you select Harness size S, the collar included in the set is Collar size M. (For M/L/XL sets, the collar matches the harness size.)