How big is a Border Collie?
Up to 53 cm (21 in) at the shoulder, per the FCI breed standard: here it is to scale next to a person, with its weight, how long it lives and when it becomes a senior.
To scale, next to a person
The breed in numbers
- Height
- 53 cm
- Weight
- not in the standard
- Median lifespan
- 13.1 years
- FCI group
- sheepdogs and cattle dogs (FCI 297)
Frequently asked questions
How tall is a Border Collie?
53 cm (21 in) at the shoulder for males, according to the official FCI breed standard (no. 297).
How much does a Border Collie weigh?
The official FCI standard gives no exact weight.
How long does a Border Collie live?
The median lifespan is 13.1 years, from a 2024 study of 584,734 dogs in the UK (McMillan et al.). Half the dogs of the breed lived longer, half shorter.
How old is it in human years?
By the formula from a 2020 DNA study: at 1 year it’s like a 31-year-old person, at 3 like a 49-year-old, at 7 like 62, at 12 like 71. The formula was found in Labradors: for other breeds it’s an estimate.
Compare it with other breeds All 42 breeds All the pets next to a person
For your dog
Always ask your vet: this site helps you understand, it doesn’t replace a checkup.
Sources
- Fédération Cynologique Internationale (FCI), breed standards (checked on October 9, 2026)
- McMillan K. M. et al., “Longevity of companion dog breeds: those at risk from early death,” Scientific Reports 2024 (CC BY 4.0) (checked on October 6, 2026)
- AVMA, “Caring for senior cats and dogs” (checked on October 6, 2026)
- Pet Nutrition Alliance, “Calculating Calories Based on Pet Needs” (checked on October 6, 2026)
- Wang T. et al., “Quantitative Translation of Dog-to-Human Aging by Conserved Remodeling of the DNA Methylome,” Cell Systems 2020 (checked on October 6, 2026)