The Sealyham Terrier is a small and sturdy dog breed known for its distinctive appearance, playful nature, and fearless demeanor. These dogs typically weigh between 20 to 24 pounds and stand around 10 to 12 inches tall at the shoulder. The Sealyham Terrier has a compact and well-balanced build, with a wiry, weather-resistant coat that is typically white in color, sometimes with markings of lemon, tan, or badger. They have a square-shaped head, with a strong jaw, dark, expressive eyes, and pendant ears that hang close to the head.