Clumber Spaniels are a medium to large breed. They typically stand between 17 to 20 inches (43 to 51 cm) tall at the shoulder and weigh between 55 to 85 pounds (25 to 39 kg), with males generally being larger than females. They have a sturdy and solid build.

Clumber Spaniels are known for their gentle, affectionate, and calm demeanor. They tend to be friendly, loyal, and sociable, making them excellent family pets. They are typically good with children and other pets, but they can be reserved with strangers. Their intelligence and loving nature make them responsive to training, though they may be a bit stubborn at times.

The Clumber Spaniel has a thick, water-resistant double coat that is medium in length. The outer coat is straight and slightly wavy, while the undercoat is dense and soft. Their coat is predominantly white, often with lemon or orange markings. Regular grooming is necessary to manage shedding and maintain the coat's health.

Clumber Spaniels thrive in active households where they can receive ample exercise and companionship. They can adapt to various living environments, including homes with yards or apartments, as long as they get regular exercise. Though they enjoy outdoor activities, they also appreciate time spent indoors with their families.

Clumber Spaniels require regular exercise to maintain their overall health and happiness. Daily walks, play sessions, and opportunities to explore their surroundings are essential. They enjoy activities such as retrieving games, swimming, and participating in dog sports like obedience and agility. Given their hunting background, engaging them in scent work or tracking activities can be particularly fulfilling.