It helps to have a good sense of humor when living with a Smooth Fox Terrier. They are about 15in. Although they are lap sized, in their hearts they are much larger. They are friendly and outgoing with almost everyone they meet. On the other side, they can and often are aggressive to other dogs - in fact with most other animals of any size.
Individuals can vary quite a bit in temperament, due to heredity and upbringing.
Very rarely is a Smooth Fox Terrier aggressive to people. Smooth Fox Terriers can make wonderful family dogs. They usually like children, however, we only recommend them with children 7 years and older. They are active and strong enough to keep up with them. A Smooth should always be kept in a securely fenced yard or on a leash when being walked.