How to Measure a Dog Collar Correctly (Step-by-Step Guide)

Choosing the right dog collar starts with one simple step: measuring your dog’s neck correctly. A collar that’s too tight can cause discomfort, while one that’s too loose can slip off during walks.

In this guide, you’ll learn exactly how to measure your dog collar size, avoid common mistakes, and choose the perfect fit for your dog’s comfort and safety.

Why Proper Dog Collar Measurement Matters

A properly fitted dog collar:

• Keeps your dog safe during walks

• Prevents choking or skin irritation

• Ensures better control on the leash

• Helps puppies grow comfortably without frequent replacements

Many pet owners guess collar sizes — and that’s where problems start.

What You Need to Measure a Dog Collar

Before you start, grab:

• A soft measuring tape (tailor’s tape works best)

• Or a string + ruler

• A calm dog (treats help)

Step-by-Step: How to Measure Your Dog’s Collar Size

Step 1: Measure Your Dog’s Neck

Wrap the measuring tape around the base of your dog’s neck, where the collar naturally sits (just above the shoulders).

 Make sure it’s snug, not tight.

Step 2: Use the Two-Finger Rule

Once the tape is around the neck:

• Slide two fingers between the tape and your dog’s neck

• This ensures comfort and proper airflow

 This is the golden rule for dog collar fitting.

Step 3: Note the Measurement

Write down the measurement in inches or centimeters.

Example:

• Neck size: 14 inches

• Ideal collar size: 14–16 inches (adjustable range)

Always choose an adjustable dog collar that fits within your dog’s neck size range.

 You can explore adjustable options in our Dog Collars Collection designed for comfort and everyday use.

How Tight Should a Dog Collar Be?

A dog collar should be:

• Snug enough not to slip over the head

• Loose enough to fit two fingers comfortably

 Too tight = discomfort, hair loss, breathing issues
 Too loose = slipping off, escape risk

Measuring Puppies vs Adult Dogs

Puppies

• Measure every 4–6 weeks

• Choose collars with extra adjustment space

• Avoid heavy or rigid materials

Adult Dogs

• Measure once, then re-check every few months

• Weight changes can affect fit

Common Dog Collar Measuring Mistakes (Avoid These)

• Measuring too high on the neck

• Pulling the tape too tight

• Guessing based on breed size

• Buying non-adjustable collars

• Ignoring size charts

 Every brand’s sizing can vary — always check the product size guide.

Collar vs Harness: Does Measurement Change?

Yes.

• Collars → Measure neck circumference

• Harnesses → Measure chest/girth

If your dog pulls a lot on walks, you may want to consider pairing a collar with a harness for extra control.

FAQs About Measuring Dog Collars

Can I measure a dog collar instead of the neck?

Yes but only if the collar fits perfectly. Lay it flat and measure from buckle to the hole your dog uses.

How often should I re-measure?

• Puppies: monthly

• Adults: every 6–12 months

What if my dog is between sizes?

Always size up, not down.

Final Tips for Choosing the Right Dog Collar

• Choose adjustable collars

• Pick breathable, durable materials

• Match collar width to dog size

• Prioritize comfort over style (you can have both!)

Browse our collars, leashes and harness designed for daily walks, training, and long-term comfort.