The Sealyham Terrier (Welsh: Daeargi Sealyham) is a rare Welsh breed of small to medium-sized terrier that originated in Wales as a working dog. It is principally a white-bodied, rough-coated breed, developed in the mid-to-late-19th century by Captain John Edwardes at Sealyham House, Pembrokeshire. Sealyhams measurements vary by breed standard according to particular countries. The Kennel Club breed standard states that the height of a Sealyham Terrier should not exceed 12 inches (30 cm), measured at the withers or at the top of the shoulder blade. The ideal weight for a Sealyham is 8 kilograms (18 lb) for females, or 9 kilograms (20 lb) for males. (Source: Wikipedia.org, CC BY-SA)