Quick answer
Measure your dog's neck snugly with a soft tape, then add 2 inches for comfort. Choose an adjustable collar like the Santa Paws Red Collar for a custom fit.
Why getting the right collar size matters
A collar that is too tight can cause discomfort or even injury, while one that is too loose may slip off during walks. The goal is a fit that allows two fingers to slide between the collar and your dog's neck. Adjustable collars, such as those with multiple sizing holes or buckle adjustments, make it easier to achieve this balance without guesswork.
Trade-offs with adjustable collars
Adjustable collars offer flexibility as your dog grows or if you have a breed with a neck that changes size (like a growing puppy or a dog with a thick coat). However, the adjustment range is limited by the collar's length. Always check the minimum and maximum length of the collar against your dog's neck measurement to ensure a proper range.
How to choose the right collar size: decision rules
- Measure your dog's neck: Use a soft measuring tape around the base of the neck where the collar sits. Add two fingers' width for comfort, then note the total length in inches. Your dog's neck measurement plus 2 inches is the minimum collar length you need.
- Compare with collar's adjustable range: Check the collar's listed length range (e.g., 9.5-14 inches). Ensure your dog's neck measurement falls within that range, not at the extreme ends, for best adjustability. Choose a collar where your dog's size sits comfortably in the middle of the range.
- Consider width and weight: Narrower collars (15mm) suit small breeds or puppies, while wider ones (20mm) distribute pressure better for medium dogs. The Santa Paws Red Collar comes in both widths. Match width to your dog's size and activity level for comfort.
Product facts
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Santa Paws Red Collar 15mm (5/8" Wide - 9.5-14" Length): The Santa Paws Red Collar 15mm is made with premium nylon webbing and features a trademarked buckle bone side release buckle. The durable nylon and solid stainless steel D-rings provide long-lasting wear, while the adjustable design fits neck sizes 9.5 to 14 inches.
Santa Paws Red Collar 15mm (5/8" Wide - 9.5-14" Length)
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Santa Paws Red Collar 20mm (4/5" Wide - 12.5-18.5" Length): The Santa Paws Red Collar 20mm also uses premium nylon webbing and the same sturdy hardware. This wider collar (20mm) offers a bit more surface area for dogs with thicker necks, fitting 12.5 to 18.5 inches, and matches Red Dingo tags perfectly.
Santa Paws Red Collar 20mm (4/5" Wide - 12.5-18.5" Length)
Fit guidance
Best for
- Small to medium dogs with neck sizes 9.5-18.5 inches
- Owners wanting a festive, adjustable collar that pairs with ID tags
Not for
- Dogs with necks larger than 18.5 inches (need a larger size)
- Very heavy pullers that require a wider, heavy-duty collar
