a bull terrier does have a relatively large genitalia so I would assume the breed would be medium size
A Staffordshire Bull Terrier is a small to medium sized breed of dog in the Terrier Breed Group. It is an athletic, intelligent and very strong breed that is rated as one of the top 5 Best Family Dogs.
A Tibetan Terrier.
A breed of small dog.
The appearance of the Australian terrier is as follows. It is a small breed dog. It has short legs. It is about 14 pounds. It has a medium length shaggy harsh double coat that is not normally trimmed.
The Russian Toy Terrier is a very small breed of dog. This breed only weighs six pounds when fully grown.
cairn terrier
Medium, because they are small-medium sized dogs.
The spelling "Teacup Terrier" is a term for a very small Yorkshire terrier breed.
Usually the terrier breed. Like the cairn terrier and the jack russel. Also, the teacup breed. Like the teacup poodle. They are extremely small dogs.
The Yorkshire Terrier (also known as a Yorkie) is a small dog breed of the terrier breed. The breed has a maximum size of 7 pounds. Its coat is black, grey and tan. The life span of a Yorkie Terrier is between 13 and 16 years.
They grow to be a fairly small sized breed.
The Silky Terrier breed originated from Australia and is a small breed of dog. They are alert, active, wedge-shaped head, and have a coat that is long, silky, tan, white, and grey.