PetSafe Martingale Collar size chart (in & cm)
PetSafe publishes 5 sizes for the Martingale Collar, sized by neck (top of neck, directly behind the ears). The chart runs from 5.5 to 20 in14 to 50.8 cm.
Source: PetSafe official size chart, checked Nov 4, 2026.
The full PetSafe Martingale Collar chart
Exactly as PetSafe publishes it. Use the in / cm toggle at the top of the page.
| Size | Neck | Strap width | Breeds the maker names |
|---|---|---|---|
| Petite | 5.5–8 in14–20.3 cm | 3/8 inch | Chihuahua, Yorkshire Terrier |
| Small | 8–12 in20.3–30.5 cm | 3/4 inch | Mini Poodle, Mini Schnauzer |
| Medium (3/4 inch) | 10–16 in25.4–40.6 cm | 3/4 inch | Retriever, Greyhound, Jack Russell Terrier |
| Medium (1 inch) | 10–16 in25.4–40.6 cm | 1 inch | Retriever, Greyhound, Jack Russell Terrier |
| Large | 14–20 in35.6–50.8 cm | 1 inch | Border Collie, Shepherd, Labrador, Rottweiler |
- PetSafe prints in only (cm converted).
- The centimetre values were converted here at 2.54 cm per inch and 0.45359237 kg per pound, not printed by the maker.
Worth checking: Maker: the measurement equals the collar when fully tightened/closed. Medium is offered in two widths with the same neck range. PetSafe's Martingale with Quick Snap Buckle has a DIFFERENT chart (https://www.petsafe.com/p/martingale-collar-with-quick-snap-buckle/PQC-M-3_4-BLK/).
If your dog is between two sizes
PetSafe publishes no between-sizes guidance for the Martingale Collar, so this site will not invent one. Between sizes. Check the maker’s chart before you buy.
This site treats a measurement within 1 in of the edge of a size, or inside two sizes at once, as between sizes, and shows both. Work it out with the collar calculator, or read how to measure your dog.
Popular breeds on the PetSafe Martingale Collar chart
10 of the most popular breeds that have a published neck girth, mapped onto this chart. Only 57 of 127 breed records have a girth at all, so this is a sample, not a ranking. A breed range is a range: two dogs of the same breed can land in different sizes, so measure your dog.
| Breed | Typical neck | Size on this chart | How it was worked out |
|---|---|---|---|
| French Bulldog | 13–18 in33–45.7 cm | Medium (3/4 inch) to Large (3 sizes)Measure your dog’s neck to pick one. | by neck girth |
| Labrador Retriever | 17–23 in43.2–58.4 cm | Large | by neck girth |
| Golden Retriever | 16–24 in40.6–61 cm | Medium (3/4 inch) to Large (3 sizes)Measure your dog’s neck to pick one. | by neck girth |
| German Shepherd Dog | 18–24 in45.7–61 cm | Large | by neck girth |
| Dachshund (Standard) | 12–16 in30.5–40.6 cm | Small to Large (4 sizes)Measure your dog’s neck to pick one. | by neck girth |
| Poodle (Standard) | 15–20 in38.1–50.8 cm | Medium (3/4 inch) to Large (3 sizes)Measure your dog’s neck to pick one. | by neck girth |
| Beagle | 13–17 in33–43.2 cm | Medium (3/4 inch) to Large (3 sizes)Measure your dog’s neck to pick one. | by neck girth |
| Rottweiler | 20–26 in50.8–66 cm | Large | by neck girth |
| Cavalier King Charles Spaniel | 12–15 in30.5–38.1 cm | Small to Large (4 sizes)Measure your dog’s neck to pick one. | by neck girth |
| Yorkshire Terrier | 8–11 in20.3–27.9 cm | Petite to Medium (1 inch) (4 sizes)Measure your dog’s neck to pick one. | by neck girth |
Where a breed’s published girth reaches across three or more sizes, the first and last are shown with the count. This site will not pick one of them for you.
- Breed heights and weights: AKC breed pages, checked Nov 4, 2026.
- Girth: Hund & Shore, "Dog Collar & Harness Size Chart by Breed"
How to measure for this collar
PetSafe sizes this collar by neck (top of neck, directly behind the ears).
Run a soft tape around the widest part of the rib cage, just behind the front legs, and keep it snug but not tight. Two fingers should slide under it. Measure twice: a tape that has slipped an inch is the single most common reason a size is wrong.
A number off this chart is where to start, not a fitting. Measure your dog and check PetSafe’s own current chart before you buy.
PetSafe Martingale Collar
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Sizes here come from the maker’s own chart, not from any retailer.
Nearest collar charts
Charts that cover a similar range, if this one is too small or too large for your dog.
- Wild One Waterproof Dog Collar
5 sizes · 7–23 in
- Blueberry Pet Classic Solid Color Adjustable Dog Collar
4 sizes · 8–26 in
- Max and Neo Martingale All Nylon Dog Collar
4 sizes · 10–26 in
- 2 Hounds Design Side Release (Buckle) Collar / Buckle Martingale
6 sizes · 7–34 in
Back to every collar chart · Dog collar size chart