A collar or harness that fits properly is more comfortable and harder to slip out of. All you need is a soft tape measure and a couple of treats. No tape measure? Use a piece of string, mark it, then measure the string against a ruler.
Before you start
- Measure with your dog standing square on all four paws.
- Keep the tape snug against the coat without squeezing.
- Measure twice and use the larger number.
Measuring for a collar
- Wrap the tape around the neck where the collar will sit, usually the base of the neck just above the shoulders.
- Slide two fingers flat under the tape. This is the breathing and growing room.
- Read the measurement with your fingers still in place and match it to the size chart.
| Everyday Collar size | Neck measurement | Collar width |
|---|---|---|
| Small | 20–30 cm | 15 mm |
| Medium | 30–45 cm | 20 mm |
| Large | 40–60 cm | 25 mm |
Measuring for a harness
- Chest girth: measure around the widest part of the rib cage, a hand-width behind the front legs. This is the measurement that matters most.
- Neck opening: measure around the base of the neck, lower than a collar sits, where the harness straps will rest.
- Match the chest measurement to the chart first, then check the neck opening falls inside the range.
| Comfort Walk Harness size | Chest girth | Neck opening |
|---|---|---|
| Small | 40–55 cm | 30–40 cm |
| Medium | 55–70 cm | 40–50 cm |
| Large | 70–90 cm | 50–62 cm |
Checking the fit
- Two-finger test: two fingers should slide flat under the collar or any harness strap. Looser and it can slip off; tighter and it can rub.
- Between sizes? Choose the larger size and adjust down.
- Puppies: re-check the fit every week. They grow quickly.
- Fluffy coats: measure under the fluff, against the body.
Still unsure? Send us your dog’s measurements and we will suggest a size.