Dog size chart by weight

Small, medium or large? Type your puppy's age and weight to see which size group it will likely grow into.

Age

weeks

Weight

Size group when grown, if you know it

Grown, your puppy will weigh about ? lb

General information, not veterinary advice. Breeds, mixes and individual puppies vary; your vet can tell you how your puppy is growing.

Size groups by grown weight

Size groups go by a dog's weight when grown. Other charts set the lines a pound or two apart; these are the ones Pupsize uses for every estimate.

Size group	Grown weight	Examples	Done growing
Toy	Under 12 lb	Chihuahua, Yorkshire terrier, Pomeranian	9 to 12 months
Small	12 to 25 lb	French bulldog, Cavalier King Charles spaniel, Boston terrier	10 to 12 months
Medium	25 to 50 lb	Border collie, Bulldog, Australian cattle dog	12 to 15 months
Large	50 to 90 lb	Labrador retriever, Golden retriever, German shepherd	12 to 18 months
Giant	Over 90 lb	Great Dane, Mastiff, Saint Bernard	18 to 24 months

For example, a puppy of 20 lb at 12 weeks, breed unknown, most likely grows into a large dog of about 50 to 84 lb.

On Pupsize, a medium dog weighs 25 to 50 lb grown. Border collies and bulldogs are typical medium dogs.

It sits on the line. Pupsize counts a dog up to 50 lb grown as medium and one over 50 lb as large.

Choose "Not sure" in the planner. Pupsize checks each size group and picks the one whose grown range fits your puppy's age and weight.