🐾 Pets · Dog breeds
What Size Collar & Harness for a Australian Shepherd?
For an adult Australian Shepherd, a M collar and M harness are the usual starting point, based on a typical neck of 38–46 cm and chest of 56–71 cm. But every dog is different — measure yours and use the two-finger rule before buying.
Collar: M · Harness: M
Typical neck 38–46 cm · chest 56–71 cm · weight 18–30 kg
⚠️ Measure your dog — breed is only a starting point. A Australian Shepherd's build varies a lot between individuals, and a collar is a safety item. Measure the neck snug, add about 2-3 cm (the two-finger rule), and confirm against the specific collar's size guide before buying.
Typical measurements for an adult Australian Shepherd:
| Typical range | Recommended size | |
|---|---|---|
| Neck (collar) | 38–46 cm (15.0–18.1 in) | M |
| Chest (harness) | 56–71 cm (22.0–28.0 in) | M |
| Weight | 18–30 kg | — |
Got a tape measure handy? The collar & harness calculator turns your exact measurement into a size with the two-finger fit built in.
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