The Chartreux is a large, muscular cat with short, relatively fine-boned limbs, big round paws and extremely fast reflexes. It is described as being primitive in type – neither cobby nor classic. The Chartreux is sometimes confused with the British Blue Shorthair, as they are quite similar in appearance. Both breeds are large, robust and full in body, with legs that are slightly shorter in proportion to their bodies. However, the Chartreux is lighter, more slender and more refined than its British counterpart and is never referred to as course or clumsy. The Chartreux has been described as looking like a “potato on toothpicks”. Both the Chartreux and the British Blue Shorthair are truly “blue” in coloration, which is not common in domestic cats.

This is a friendly, intelligent, self-confident and affectionate breed, but not intrusively so. Chartreux cats tend to be quiet-voiced and typically do not annoy their owners with constant meowing or crying. They are quite observant and have been known to operate radio buttons and open screen door latches with their faces and paws. Chartreuxs are playful well into their adult years. They are gentle and good with children and other animals. They are non-aggressive and very affectionate. They also are good travelers. Chartreux tend to bond with one person in their household more than others, preferring to be in the general vicinity of that one special person, often following him or her from room to room. However, they are still loving and affectionate to other members of the household.