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What Size Collar & Harness for a Flat-Coated Retriever?

For an adult Flat-Coated Retriever, a M collar and L harness are the usual starting point, based on a typical neck of 41–48 cm and chest of 61–76 cm. But every dog is different — measure yours and use the two-finger rule before buying.

Collar: M  ·  Harness: L
Typical neck 41–48 cm · chest 61–76 cm · weight 25–36 kg
⚠️ Measure your dog — breed is only a starting point. A Flat-Coated Retriever'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 Flat-Coated Retriever:

Typical rangeRecommended size
Neck (collar)41–48 cm (16–19 in)M
Chest (harness)61–76 cm (24–30 in)L
Weight25–36 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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