Golden Retriever Fully Grown. At What Age is a Golden Retriever Considered Fully Grown. Once they reach four months your Golden puppy will reach half of their potential height.

At six-month age they will be two-thirds of their weight as full adults. The ultimate Golden Retriever puppy growth chart by weight. Somewhere between 9 and 12 months of age your retriever reaches full adult height.
It takes about 18 months for a Golden to reach their full adult weight as an eight-week-old puppy the average Golden Retriever size is just 10 pounds when theyre ready to leave mom.
They will likely continue to increase in weight for some time after that. Character traits become more fixed and consistent. Full-grown male golden retrievers on average weigh 65-75 pounds and are 23-24 inches tall. Aside from the physical growth golden retrievers also grow emotionally.