Border Collie standing alert in a grassy field, with the blog title ‘Border Collie Size Guide’ overlaid at the top

Average Size for Border Collies: How Genetics and Nutrition Shape Our Furry Friends

Border Collies are smart, energetic, and endlessly curious—but just how big do these furry dynamos get? Like humans, a Border Collie’s size depends on genetics, nutrition, and even sleep as a puppy. Some pups are lean and sprightly, while others are a bit stockier—but on average, most Border Collies weigh between 12–20 kilograms.

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