📅 Last updated:
A collar on a Newfoundland has to cope with things most collars never face: a neck measuring over two feet around, a dense double coat that mats at the slightest friction, daily soakings in lakes and water bowls, and a steady supply of drool. Choose the wrong one and you end up with a matted ring around the neck, a musty smell or a collar that slips over the head. This guide explains which collar types and materials suit a Newfoundland and how to fit one properly through all that fur.
📋 Table of Contents
What the collar is for
For most Newfoundlands, the collar is primarily for identification: tags, license and contact details. Many owners walk their Newfie on a harness, which is gentler on the neck for a giant, heat-sensitive breed. A collar still needs to be secure and comfortable, because it may be worn every day for a decade.
ADITYNA Heavy Duty Leather Dog Collar for Giant Dogs, Adjustable 30-36"
Included for 'Best dog collar for newfoundland 2026' because the listing specifies Adjustable 30-36", details this guide uses to compare options.
View on Amazon
ADITYNA Heavy-Duty Dog Collar with Handle, XXL, Adjustable 27-32" Neck
Included for 'Best dog collar for newfoundland 2026' because the listing specifies XXL and Adjustable 27-32" Neck, details this guide uses to compare options.
View on Amazon
ADITYNA Heavy Duty Dog Collar for Extra-Large Dogs with Traffic Handle
Included for 'Best dog collar for newfoundland 2026' as a relevant option in this category; details come from the product listing.
View on AmazonSizing through a thick coat
See also: Best Electric Dog Fences for Reliable, Humane Containment • Best Dog Boots for Basset Hound
Measure the neck with a soft tape pressed through the coat to the skin, not over the fluff. Adult Newfoundlands typically measure 24-32 inches, with large males at the top of that range. The collar should allow two flat fingers between collar and neck at the skin. If you fit it over the coat, it will be too loose and can slide off over the head, or twist and mat the fur. Recheck the fit after grooming, after a summer trim, and as puppies grow; a Newfie puppy may need several collar sizes in its first year.
Collar types for a Newfoundland
Rolled leather collar
Rolled (round) leather collars are a favourite among long-coated breed owners because they sit in the coat with less flattening and matting than a flat collar. Choose a thickness appropriate for a giant dog and a sturdy buckle.
Wide flat collar
A 1.25-1.5 inch flat collar spreads pressure well and holds tags securely. Choose soft edges to reduce coat wear.
Biothane collar
Waterproof and odor-resistant, ideal for a dog that swims often. It dries in minutes, reducing the damp, musty ring that can form under nylon.
Martingale
Useful for dogs that back out of collars, because it tightens to a set limit. Remove it when the dog is unsupervised.
| Collar type | Width | Main advantage | Typical price range |
|---|---|---|---|
| Rolled leather | 0.75-1 in diameter | Less matting in long coat | Check on Amazon |
| Flat leather | 1.25-1.5 in | Durable, spreads pressure | Check on Amazon |
| Biothane | 1-1.5 in | Waterproof, no smell | Check on Amazon |
| Martingale | 1-1.5 in | Escape-resistant | Check on Amazon |
| Breakaway | 1 in | Safe unsupervised wear | Check on Amazon |
Materials to think twice about
Standard nylon webbing absorbs water, drool and odor, and stays damp against the skin under a dense coat, which can encourage hot spots. If you use nylon, take it off to dry after swims. Choke chains and prong collars are not suitable for a gentle, heavy dog prone to heat stress and heart conditions; training with rewards and a front-clip harness is more effective. Collars with lots of decorative hardware can snag and tangle in the coat.
Preventing mats and skin problems
Friction from a collar is one of the most common causes of matting around a Newfoundland’s neck. Brush the neck area thoroughly two or three times a week with a slicker and comb. Remove the collar for part of each day, especially after swimming, so the coat and skin can dry. Check under the collar for redness, odor, moisture or hair loss. A persistent hot spot or sore under the collar should be seen by your vet.
ID for a big dog
Use a flat, riveted ID plate or a single engraved tag to avoid tags dangling in the water bowl, which Newfies splash liberally. Keep microchip details up to date, since collars can come off in water or brush.
FAQ
What size collar does a Newfoundland need?
Most adults need a collar for a 24-32 inch neck, measured through the coat to the skin with two fingers of space.
Why does my Newfoundland’s coat mat under the collar?
Friction and moisture cause mats. A rolled collar, regular neck brushing and removing the collar after swims help prevent it.
Bottom line
The best collar for a Newfoundland is a rolled leather or waterproof biothane collar fitted at the skin through the coat, carrying a flat ID plate. Brush the neck regularly, let the collar and coat dry after swims, use a martingale only for escape risks, and walk your Newfie on a harness for comfort and control.
