Cat Breed Comparison
Chartreux vs Russian Blue: Key Differences
Chartreux and Russian Blue are often confused. Compare their size, weight, lifespan, origin, temperament, and health — and learn how to tell them apart at a glance.
Quick Comparison
| Trait | Chartreux | Russian Blue |
|---|---|---|
| Size | Medium to Large | Medium |
| Weight | 7–17 lbs (3–7.7 kg) | 7–12 lbs (3–5.5 kg) |
| Lifespan | 12–15 years | 12–17 years |
| Origin | France | Russia (Arkhangelsk region) |
Visual Differences
Telling a Chartreux from a Russian Blue
Russian Blues have a svelte, elongated foreign-type body, a wedge-shaped head, and vivid green eyes. Chartreux are stockier, rounder-headed, have copper to orange eyes (never green), and a woolly double coat versus the Russian Blue’s silky plush coat. Chartreux males are notably heavier-boned and larger than Russian Blues.
Telling a Russian Blue from a Chartreux
Chartreux are also blue-gray but have a much rounder, fuller face with a shorter nose, a stockier cobby body (not the svelte foreign type of the Russian Blue), and orange or copper eyes — never green. Chartreux coats are also a double coat but thicker and more woolly, described as "lamb-like" rather than the silky velvet of the Russian Blue.
Chartreux Key Markers
- Medium-short, slightly woolly double coat that breaks like sheepskin at the neck and flanks — resilient undercoat with a longer protective topcoat; the texture is distinctively "lamb-like" and water-repellent, unlike the silky coat of the Russian Blue
- Rounded, broad head that is "not a sphere" per the CFA standard — high gently contoured forehead, straight nose of medium length and width with a slight stop at eye level, and a comparatively small, narrow tapered muzzle that gives the breed its characteristic "sweet, smiling expression"
- Rounded, open eyes with a rich copper to deep brilliant orange color — the CFA standard prefers a clear, deep, brilliant orange; the warmth of the eye color against the blue-gray coat is one of the breed’s most striking features
Russian Blue Key Markers
- Short, dense double coat in a clear even blue-gray — each hair has silver-tipped guard hairs that create a shimmering, iridescent effect; the coat stands away from the body (does not lie flat) and feels like thick plush velvet or silk; CFA calls it "short, dense, fine, and plush — standing up from the body"
- Wedge-shaped head with a flat skull and a long straight nose — the profile has a gentle break at eye level; the muzzle is short but the whisker pads are prominent, giving the face a distinct "smiling" expression
- Large, wide-set vivid green eyes in the shape of an almond laid on its side — kittens are born with yellow eyes that turn a distinct emerald green by 4 months old; the green is striking against the blue-gray coat
Temperament & Personality
Chartreux
- Quiet to the point of near-silence — the breed is famous for its tiny voice used rarely; some Chartreux are mute and communicate entirely through body language, expressive eyes, and gentle chirps
- Dog-like personality — learns to walk on a leash, plays fetch, comes when called, and follows owners from room to room
- Intelligent with lightning-fast reflexes — responds to its name and develops daily rituals and routines with family members
- Calm and undemanding — affectionate without being needy; shares space peacefully without demanding constant attention
- Good with children, other cats, and cat-friendly dogs — a patient, even-tempered breed that rarely reacts aggressively in new situations
- Slow to mature — takes 3–5 years to reach full physical and emotional maturity, remaining kitten-like in playfulness and energy during the slow maturation period
- Creature of habit — develops strong attachments to daily routines and may become unsettled by major schedule changes or disruptions
Russian Blue
- Intelligent and observant — watches household routines and learns patterns; opens doors, turns on taps, and responds to its name
- Reserved with strangers — hides when visitors come, then emerges to inspect from a distance once the house is quiet
- Fiercely devoted to their family — follows their person, sleeps under the covers, demands head bumps and cheek rubs on their own terms
- Sensitive to change and loud environments — research places the breed among the least adaptable to multi-cat households, boarding, or renovation noise; best in calm, predictable homes
- Quiet — meows rarely and softly; communicates through body language, eye contact, and gentle head-butting
- Playful but not destructive — enjoys chasing, fetching, and puzzle feeders but will entertain itself quietly when no one is available to play
- Appreciates high perches — likes to be above the action, watching from cat trees or shelves rather than being on the floor in the middle of activity
Health Notes
Chartreux
- Patellar luxation — kneecap dislocation seen in some Chartreux lines; ranges from occasional skipping (mild) to lameness requiring surgery (severe); breeders screen for this condition
- Obesity — the breed’s robust appetite and moderate activity level make weight management a priority; Chartreux are naturally massive cats, but excess weight strains their joints and organs
- Hypertrophic cardiomyopathy (HCM) — reported in the breed, though at lower incidence than breeds like Maine Coons; regular cardiac screening recommended for breeding cats
- Feline lower urinary tract disease (FLUTD) — some lines show predisposition; high-moisture diet and maintaining healthy weight are preventive measures
- Dental disease — the compact muzzle structure can contribute to tooth crowding and gingivitis; regular dental care recommended throughout life
Russian Blue
- Feline lower urinary tract disease (FLUTD) — Russian Blues show a higher-than-average predisposition to bladder stones and urinary tract inflammation; the breed’s calm stress-reactive nature may contribute to stress-triggered cystitis; high-moisture diet and stress management are key preventive measures
- Obesity — the breed’s moderate activity level and love of food can lead to weight gain; the fine-boned body frame makes even extra ounces noticeable on their silhouette
- Hypertrophic cardiomyopathy (HCM) — reported in the breed, though at lower incidence than in Maine Coons or Ragdolls; regular cardiac screening recommended for breeding cats
- Dental disease — narrow muzzle structure contributes to tooth crowding and gingivitis risk; regular dental care recommended
- Sensitivity to anesthesia — all svelte-type breeds with low body fat have a narrower anesthesia safety margin; discuss with a veterinarian before any surgical procedure
This information is for educational purposes only. Always consult a veterinarian for health advice specific to your cat.
Frequently Asked Questions
How can I tell a Chartreux apart from a Russian Blue?
Russian Blues have a svelte, elongated foreign-type body, a wedge-shaped head, and vivid green eyes. Chartreux are stockier, rounder-headed, have copper to orange eyes (never green), and a woolly double coat versus the Russian Blue’s silky plush coat. Chartreux males are notably heavier-boned and larger than Russian Blues.
How can I tell a Russian Blue apart from a Chartreux?
Chartreux are also blue-gray but have a much rounder, fuller face with a shorter nose, a stockier cobby body (not the svelte foreign type of the Russian Blue), and orange or copper eyes — never green. Chartreux coats are also a double coat but thicker and more woolly, described as "lamb-like" rather than the silky velvet of the Russian Blue.
Are Chartreux cats hypoallergenic?
No — Chartreux are not hypoallergenic. Their dense double coat produces normal levels of dander and sheds moderately, so allergy sufferers should spend time with the breed before committing.
When do Russian Blue kittens’ eyes turn green?
Russian Blue kittens are born with yellow eyes that gradually shift to a vivid emerald green, usually by about 4 months of age. If an adult cat’s eyes are still yellow, orange, or copper, it is likely not a pure Russian Blue.
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Breed Profiles & More Comparisons
Chartreux
A sturdy blue-gray cat from France with a woolly double coat, copper-gold eyes, and a quiet, dog-like personality. Chartreux are known for their "smiling" expression, lightning-fast reflexes, and rare voice — one of the oldest natural breeds, prized since medieval times for their hunting ability.
Russian Blue
A blue-gray short-hair with a shimmering silver sheen and vivid green eyes. Russian Blues are reserved with strangers but deeply affectionate with their own people — quiet, gentle, and sensitive. The breed’s double coat stands up from the body, giving the cat a plush, velvety feel that cat breeders call "the smile under the hand."