Collies are medium to large-sized dogs. The Rough Collie typically stands about 18 to 22 inches (46 to 56 cm) tall at the shoulder and weighs between 50 to 75 pounds (23 to 34 kg), while the Smooth Collie is slightly smaller, standing 18 to 20 inches (46 to 51 cm) tall and weighing around 40 to 65 pounds (18 to 29 kg).

Collies are known for their gentle, loyal, and intelligent nature. They tend to be friendly and good-natured, making them excellent family pets. They are highly trainable and responsive, often excelling in obedience and agility. Collies are also protective of their families but typically have a calm disposition. Early socialization and consistent training are important for fostering good behavior.

Collies have two main coat types: Rough and Smooth. The Rough Collie has a long, flowing double coat that is abundant and can come in various colors, including sable, blue merle, and tri-color. The Smooth Collie has a shorter, dense coat that lies flat against the body. Both coat types require regular grooming, especially the Rough Collie, to prevent matting and control shedding.

Collies are known for their gentle, loyal, and intelligent nature. They tend to be friendly and good-natured, making them excellent family pets. They are highly trainable and responsive, often excelling in obedience and agility. Collies are also protective of their families but typically have a calm disposition. Early socialization and consistent training are important for fostering good behavior.

Collies require regular exercise to maintain their physical and mental well-being. Daily walks, play sessions, and activities that engage their natural herding instincts are essential. They enjoy games such as fetch and frisbee and may excel in dog sports like obedience, agility, and herding trials. Engaging Collies in training and interactive activities can help keep their minds stimulated.