Whilst buying or adopting an adorable puppy spontaneously may sound like a great idea, certain breeds of dog can double or even triple in size from pups to adults.
Many people are sadly simply not prepared for how money, effort and space is necessary to keep some dog breeds.
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That's why it’s important to realise that the cute puppy you’ve been considering adding to your family will end up being a very different animal when it reches adulthood.
To help out pet insurance company PetPlan has analysed the size growth of 60 of the UK’s most popular dog breeds, comparing how tall they are as puppies (eight weeks) to the size they are at fully grown (one year).
Here are the 10 pups that grow the most.
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![That tiny and cute Boxer puppy will also more grow to 243 per cent in height by the time its one year old.](https://www.scotsman.com/webimg/b25lY21zOjM4NjVkOGQ4LTI5YTAtNGUxYi1hYjJkLWE4NzA5YjFkOTNmYzpiNTRmNWIwMS1iMjk0LTRhOWEtODE0MS0zMTE2ZjVmYzgyNmQ=.jpg?crop=3:2&trim=&width=800)
5. Boxer
That tiny and cute Boxer puppy will also more grow to 243 per cent in height by the time its one year old.Photo: Canva/Getty Images
![Saint Bernard puppies are already pretty huge, but will grow 225 per cent in height in just 10 months.](https://www.scotsman.com/webimg/b25lY21zOmQ4MmUzMDc5LWIyMGItNDUxNS04NWY5LTUzMjE3Nzk0N2Y4YjphNmI1MjZkNy04NzFmLTRjMDUtYjg4NC03MzA2YzdmZmFlNzE=.jpg?crop=3:2&trim=&width=800)
6. Saint Bernard
Saint Bernard puppies are already pretty huge, but will grow 225 per cent in height in just 10 months.Photo: Canva/Getty Images
![The speedy Greyhound is another breed that grows 225 per cent between being eight weeks old and one year old.](https://www.scotsman.com/webimg/b25lY21zOjI4ZDczZjBhLWM5NWItNDc1Zi1iNmY1LWY2YWM5ZWJlNWQ4ZDo1NzBlMjFhZi1mZTllLTRiNDktOTM0Ni0zMWFhMmM2OGRlYjk=.jpg?crop=3:2&trim=&width=800)
7. Greyhound
The speedy Greyhound is another breed that grows 225 per cent between being eight weeks old and one year old.Photo: Canva/Getty Images
![The multi-talented German Shepherd grows 214 per cent in 10 months.](https://www.scotsman.com/webimg/b25lY21zOmE0NjE5NGE1LWU1MDMtNDZlZi04MmY0LWI1MDI3ZDRjMTc0NjpkZGRkNGFjZC1mMTcxLTQwZmQtYjZkOC1kOTBmODllYWFhNWU=.jpg?crop=3:2&trim=&width=800)
8. German Shepherd
The multi-talented German Shepherd grows 214 per cent in 10 months.Photo: Canva/Getty Images