A fully mature British Blue male, showing the characteristic heavy jowls and unique "crisp" texture of the coat
The British Shorthair is a relatively powerful, sturdy and compact cat, having a broad chest, strong thick-set legs with rounded paws and a medium-length, blunt-tipped tail. The head is relatively large and rounded, with a short muzzle, broad cheeks (most noticeable in mature males, who tend to develop prominent jowls) and large round eyes that are deep coppery orange in the British Blue and otherwise vary in colour depending on the coat. Their medium-sized ears are broad at the base and widely set.
They are slow to mature in comparison with most cat breeds, reaching full physical development at approximately three years of age. Unusually among domestic cats they are a noticeably sexually dimorphic breed, with males averaging 9–17 lb (4.1–7.7 kg) and females 7–12 lb (3.2–5.4 kg).
Coat and Colour
The British Shorthair's coat is one of the breed's defining features. It is very dense but does not have an undercoat; thus, the texture is plush rather than woolly or fluffy, with a firm, "crisp" pile that breaks noticeably over the cat's body as it moves.
Although the British Blue remains the most familiar variant, British Shorthairs have been developed in many other colours and patterns. Black, blue, white, red, cream, silver, golden and—most recently—cinnamon and fawn are accepted by all official standards, either solid or in colourpoint, tabby, shaded and bicolour patterns; the GCCF and TICA also accept chocolate and its dilute lilac, disallowed in the CFA standard. All colours and patterns also have tortoiseshell variants.
They are an easygoing and dignified breed, not as active and playful as many but sweet-natured and devoted to their owners, making them a favourite of animal trainers. They tend to be safe around other pets and children since they will tolerate a fair amount of physical interaction, but as a rule do not like to be picked up or carried. They require only minimal grooming and take well to being kept as indoor-only cats; however, they can be prone to obesity unless care is taken with their diet.