The Devon Rex is a breed of unique appearance. Its large eyes, short muzzle, prominent cheekbones, and huge ears create a characteristic elfin look. Hard and muscular; slender; medium length; broad chest; medium fine boning; body carried high on the legs. Modified wedge; head broad but slightly longer than broad; face full-cheeked with pronounced cheekbones and a whisker break; in profile, nose has strongly marked stop; muzzle short and well developed; prominent whisker break; chin strong and well developed. All colors and patterns including the Himalayan pattern.

The Devon Rex is an extremely intelligent cat that makes a lively, affectionate companion. They are very creative and are known to invent clever games on their own, to be shared with their human and other household companions whenever anyone will play. Anything that can be picked up or moved becomes a toy or a target to a Devon Rex. They are highly people-oriented and bond very strongly with their owners. For that reason, ownership of a Devon Rex should be considered a lifelong commitment. They give, and expect to receive, a great deal of devotion, attention and affection. The Devon Rex is not well-equipped to survive outdoors due to its short hair coat. These cats should be kept exclusively indoors.