Assyrian Mastiffs, Celtic guard dogs and Roman fighting dogs are considered to be English Mastiff ancestors. Originally Mastiff was used to protect people against predators, and also for hunting, baiting and fighting, and then - mostly as a guard dog. At the end of the 14th century, the breed got its present name - Mastiff. During the Second World War, this powerful dog has almost disappeared. It is one of the largest breeds in the world. Peaceful and loving dog, likes its owner and children. Brave and uncompromising, Mastiff is a reliable guard dog. The nature of the English Mastiff is quite different from his ancestors violent temper, he is confident, loyal and majestic. This dog is far from bustle. Mastiff needs strict training, because its huge size requires control. Their height usually comes up at the withers for males: 30-32 inches, females: not less than 27 inches. Weight: 130-220 lbs.
Mastiff is the biggest dog living on the planet. It is an ancient fighting breed originating from England. Modern English Mastiff lost his savage temper peculiar to his distant ancestors, but due to his enormous potential Mastiff is considered the most powerful fighting dog in the world. Perfect representative of this breed should be distinguished among the other dogs, like a lion among cats.
Males are heavier than females with larger and more massive head, more courageous. Females are shorter and lighter.
Mastiffs are monogamous. The dog combines greatness with kindness, courage with gentleness.
Almost all Mastiffs express a strong guardian instinct, thus they perform active behavior against the aggressor in case if their owner was attacked.
You should keep in mind that protection is not the main purpose for this breed. First of all Mastiff is a companion dog, it only serves as a watchman.
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Sizing chart
Please touch "+" to see the measurements for each size
0 - Very small breeds:like Yorkshire Terrier, Miniature Pinscher, Ratter
| LengthInches (cm) |
| 2 2/5 inch (6 cm) |
| CircumferenceInches (cm) |
| 6 2/5 inch (16 cm) |
| Eye lineInches (cm) |
| no need |
| Neck CircumferenceInches (cm) |
| 10 - 13 1/5 inch (25 - 33 cm) |
1
| LengthInches (cm) |
| 2 1/5 inch (5.5 cm) |
| CircumferenceInches (cm) |
| 7 1/5 inch (18 cm) |
| Eye lineInches (cm) |
| no need |
| Neck CircumferenceInches (cm) |
| 10 - 14 inch (25 - 35 cm) |
2
| LengthInches (cm) |
| 2 4/5 inch (7 cm) |
| CircumferenceInches (cm) |
| 8 inch (20 cm) |
| Eye lineInches (cm) |
| 2 2/5 - 6 4/5 inch (6 - 17 cm) |
| Neck CircumferenceInches (cm) |
| 10 4/5 - 16 inch (27 - 40 cm) |
3
| LengthInches (cm) |
| 2 3/5 inch (6.5 cm) |
| CircumferenceInches (cm) |
| 8 2/5 inch (21 cm) |
| Eye lineInches (cm) |
| 3 3/5 - 7 1/5 inch (9 - 18 cm) |
| Neck CircumferenceInches (cm) |
| 10 4/5 - 17 1/5 inch (27 - 43 cm) |
4 - Middle size breeds: like Poodle
| LengthInches (cm) |
| 3 3/5 inch (9 cm) |
| CircumferenceInches (cm) |
| 9 3/5 inch (24 cm) |
| Eye lineInches (cm) |
| 2 4/5 - 7 3/5 inch (7 - 19 cm) |
| Neck CircumferenceInches (cm) |
| 14 4/5 - 18 4/5 inch (37 - 47 cm) |
4L - Middle size breeds: like Poodle with longer snout
| LengthInches (cm) |
| 4 1/5 inch (10.5 cm) |
| CircumferenceInches (cm) |
| 10 inch (25 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 6 4/5 inch (4 - 17 cm) |
| Neck CircumferenceInches (cm) |
| 10 4/5 - 20 inch (27 - 50 cm) |
5 - Spaniel, Schnauzer, Foxterrier, Pinscher, Weimaraner etc.
| LengthInches (cm) |
| 4 2/5 inch (11 cm) |
| CircumferenceInches (cm) |
| 10 2/5 inch (26 cm) |
| Eye lineInches (cm) |
| 2 4/5 - 7 3/5 inch (7 - 19 cm) |
| Neck CircumferenceInches (cm) |
| 15 3/5 - 19 3/5 inch (39 - 49 cm) |
6 - Bigger dogs:like German Shepherd
| LengthInches (cm) |
| 4 inch (10 cm) |
| CircumferenceInches (cm) |
| 11 1/5 inch (28 cm) |
| Eye lineInches (cm) |
| 2 3/5 - 8 4/5 inch (6.5 - 22 cm) |
| Neck CircumferenceInches (cm) |
| 16 - 24 2/5 inch (40 - 61 cm) |
6L - Bigger dogs:like German Shepherd,with longer snout
| LengthInches (cm) |
| 4 4/5 inch (12 cm) |
| CircumferenceInches (cm) |
| 12 inch (30 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 8 inch (4 - 20 cm) |
| Neck CircumferenceInches (cm) |
| 12 4/5 - 26 2/5 inch (32 - 66 cm) |
7 - Pointer, Pitbull, Amstaff, Dalmatian, Setter, Labrador, Golden Retriever
| LengthInches (cm) |
| 4 2/5 inch (11 cm) |
| CircumferenceInches (cm) |
| 12 4/5 inch (32 cm) |
| Eye lineInches (cm) |
| 4 - 10 inch (10 - 25 cm) |
| Neck CircumferenceInches (cm) |
| 14 - 25 3/5 inch (35 - 64 cm) |
8 - Poodle (big), Siberian Husky
| LengthInches (cm) |
| 4 3/5 inch (11.5 cm) |
| CircumferenceInches (cm) |
| 14 inch (35 cm) |
| Eye lineInches (cm) |
| 6 - 10 4/5 inch (15 - 27 cm) |
| Neck CircumferenceInches (cm) |
| 20 - 28 inch (50 - 70 cm) |
9 - Alaskan Malamute etc.
| LengthInches (cm) |
| 4 4/5 inch (12.5 cm) |
| CircumferenceInches (cm) |
| 13 3/5 inch (34 cm) |
| Eye lineInches (cm) |
| 7 1/5 - 10 4/5 inch (18 - 27 cm) |
| Neck CircumferenceInches (cm) |
| 20 - 28 inch (50 - 70 cm) |
10 - Caucasian ovcharka
| LengthInches (cm) |
| 4 4/5 inch (12 cm) |
| CircumferenceInches (cm) |
| 15 3/5 inch (39 cm) |
| Eye lineInches (cm) |
| 5 3/5 - 13 3/5 inch (14 - 34 cm) |
| Neck CircumferenceInches (cm) |
| 20 4/5 - 30 inch (52 - 75 cm) |
12 - Dogs with extra broad snout:Saint Bernard
| LengthInches (cm) |
| 5 1/5 inch (13 cm) |
| CircumferenceInches (cm) |
| 19 inch (47.5 cm) |
| Eye lineInches (cm) |
| 7 1/5 - 12 inch (18 - 30 cm) |
| Neck CircumferenceInches (cm) |
| 24 4/5 - 34 2/5 inch (62 - 86 cm) |
13 - Dogs with extra big snout:Great Dane,
| LengthInches (cm) |
| 5 1/5 inch (13 cm) |
| CircumferenceInches (cm) |
| 18 inch (45 cm) |
| Eye lineInches (cm) |
| 7 1/5 - 15 1/5 inch (18 - 38 cm) |
| Neck CircumferenceInches (cm) |
| 24 4/5 - 34 2/5 inch (62 - 86 cm) |
J1 - Small dogs with longer snout
| LengthInches (cm) |
| 3 2/5 inch (8.5 cm) |
| CircumferenceInches (cm) |
| 8 inch (20 cm) |
| Eye lineInches (cm) |
| 3 1/5 - 7 1/5 inch (8 - 18 cm) |
| Neck CircumferenceInches (cm) |
| 6 3/5 - 12 4/5 inch (24 - 32 cm) |
J2 - Dachshund and other small dogs
| LengthInches (cm) |
| 3 3/5 inch (9 cm) |
| CircumferenceInches (cm) |
| 8 4/5 inch (22 cm) |
| Eye lineInches (cm) |
| 3 1/5 - 7 1/5 inch (8 - 18 cm) |
| Neck CircumferenceInches (cm) |
| 10 - 12 4/5 inch (25 - 32 cm) |
D1 - Dogs with longer snout:
| LengthInches (cm) |
| 4 4/5 inch (12 cm) |
| CircumferenceInches (cm) |
| 10 4/5 inch (27 cm) |
| Eye lineInches (cm) |
| 6 4/5 - 8 4/5 inch (17 - 22 cm) |
| Neck CircumferenceInches (cm) |
| 18 - 22 inch (45 - 55 cm) |
D2 - Doberman Pinscher, Collie
| LengthInches (cm) |
| 5 2/5 inch (13.5 cm) |
| CircumferenceInches (cm) |
| 11 1/5 inch (28 cm) |
| Eye lineInches (cm) |
| 4 2/5 - 8 2/5 inch (11 - 21 cm) |
| Neck CircumferenceInches (cm) |
| 14 - 21 1/5 inch (35 - 53 cm) |
D3 - Setter, Pointer and other dogs
| LengthInches (cm) |
| 5 2/5 inch (13.5 cm) |
| CircumferenceInches (cm) |
| 12 inch (30 cm) |
| Eye lineInches (cm) |
| 6 4/5 - 10 inch (17 - 25 cm) |
| Neck CircumferenceInches (cm) |
| 18 4/5 - 22 4/5 inch (47 - 57 cm) |
B0 - French Bulldog, Pug
| LengthInches (cm) |
| 2 3/5 inch (6.5 cm) |
| CircumferenceInches (cm) |
| 10 3/5 inch (26.5 cm) |
| Eye lineInches (cm) |
| 2 4/5 - 7 3/5 inch (7 - 19 cm) |
| Neck CircumferenceInches (cm) |
| 11 1/5 - 20 inch (28 - 50 cm) |
B0.5 - Boston terrier, French Bulldog bitch
| LengthInches (cm) |
| 2 1/5 inch (5.5 cm) |
| CircumferenceInches (cm) |
| 10 inch (25 cm) |
| Eye lineInches (cm) |
| 2 2/5 - 5 3/5 inch (6 - 14 cm) |
| Neck CircumferenceInches (cm) |
| 10 4/5 - 18 2/5 inch (27 - 46 cm) |
B1 - Dog with short snout:Boxer and other dogs with short snout
| LengthInches (cm) |
| 2 3/5 inch (6.5 cm) |
| CircumferenceInches (cm) |
| 11 1/5 inch (28 cm) |
| Eye lineInches (cm) |
| 2 2/5 - 7 3/5 inch (6 - 19 cm) |
| Neck CircumferenceInches (cm) |
| 13 1/5 - 22 inch (33 - 55 cm) |
B2
| LengthInches (cm) |
| 3 inch (7.5 cm) |
| CircumferenceInches (cm) |
| 12 4/5 inch (32 cm) |
| Eye lineInches (cm) |
| 3 - 10 inch (7.5 - 25 cm) |
| Neck CircumferenceInches (cm) |
| 15 1/5 - 24 2/5 inch (38 - 61 cm) |
B3
| LengthInches (cm) |
| 3 1/5 inch (8 cm) |
| CircumferenceInches (cm) |
| 14 inch (35 cm) |
| Eye lineInches (cm) |
| 6 4/5 - 8 4/5 inch (17 - 22 cm) |
| Neck CircumferenceInches (cm) |
| 17 1/5 - 26 inch (43 - 65 cm) |
B3.5 - Bigger male English Bulldog, Dogue De Bordeaux
| LengthInches (cm) |
| 2 4/5 inch (7 cm) |
| CircumferenceInches (cm) |
| 16 2/5 inch (41 cm) |
| Eye lineInches (cm) |
| 2 2/5 - 11 1/5 inch (6 - 28 cm) |
| Neck CircumferenceInches (cm) |
| 16 - 29 1/5 inch (40 - 73 cm) |
B4 - Big American bulldog, bullmastiff, Dogue De Bordeaux
| LengthInches (cm) |
| 3 3/5 inch (9 cm) |
| CircumferenceInches (cm) |
| 18 inch (45 cm) |
| Eye lineInches (cm) |
| 6 - 11 3/5 inch (15 - 29 cm) |
| Neck CircumferenceInches (cm) |
| 25 1/5 - 34 4/5 inch (63 - 87 cm) |
R0 - Pitbull, amstaf and similar
| LengthInches (cm) |
| 3 2/5 inch (8.5 cm) |
| CircumferenceInches (cm) |
| 13 inch (32.5 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 10 2/5 inch (4 - 26 cm) |
| Neck CircumferenceInches (cm) |
| 13 3/5 - 26 2/5 inch (34 - 66 cm) |
R1 - Dogs with broad snout:Rottweiler, Golden Retriever
| LengthInches (cm) |
| 3 4/5 inch (9.5 cm) |
| CircumferenceInches (cm) |
| 14 inch (35 cm) |
| Eye lineInches (cm) |
| 2 4/5 - 7 3/5 inch (7 - 19 cm) |
| Neck CircumferenceInches (cm) |
| 15 1/5 - 24 inch (38 - 60 cm) |
R1L - Dogs with broad snout:Rottweiler, Golden Retriever, with longer snout
| LengthInches (cm) |
| 4 3/5 inch (11.5 cm) |
| CircumferenceInches (cm) |
| 15 1/5 inch (38 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 6 4/5 inch (4 - 17 cm) |
| Neck CircumferenceInches (cm) |
| 12 - 25 1/5 inch (30 - 63 cm) |
R2 - Labrador, Big Pitbull, Amstaff, Rottweiler
| LengthInches (cm) |
| 4 inch (10 cm) |
| CircumferenceInches (cm) |
| 14 2/5 inch (36 cm) |
| Eye lineInches (cm) |
| 3 - 10 4/5 inch (7.5 - 27 cm) |
| Neck CircumferenceInches (cm) |
| 17 1/5 - 26 inch (43 - 65 cm) |
R2L - Big Labrador, Berner Sennenhund, Anatolian Shepherd
| LengthInches (cm) |
| 4 2/5 inch (11 cm) |
| CircumferenceInches (cm) |
| 15 1/5 inch (38 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 10 2/5 inch (4 - 26 cm) |
| Neck CircumferenceInches (cm) |
| 14 - 26 4/5 inch (35 - 67 cm) |
R3 - Bigger Rottweiler, Big Labrador
| LengthInches (cm) |
| 4 inch (10 cm) |
| CircumferenceInches (cm) |
| 15 1/5 inch (38 cm) |
| Eye lineInches (cm) |
| 3 - 10 4/5 inch (7.5 - 27 cm) |
| Neck CircumferenceInches (cm) |
| 21 3/5 - 30 2/5 inch (54 - 76 cm) |
R3L - Bigger Rottweiler, Big Labrador, Berner Sennenhund
| LengthInches (cm) |
| 4 4/5 inch (12.5 cm) |
| CircumferenceInches (cm) |
| 15 4/5 inch (39.5 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 10 2/5 inch (4 - 26 cm) |
| Neck CircumferenceInches (cm) |
| 18 2/5 - 31 1/5 inch (46 - 78 cm) |
R4 - Big American bulldog, bullmastiff
| LengthInches (cm) |
| 4 inch (10 cm) |
| CircumferenceInches (cm) |
| 18 4/5 inch (47 cm) |
| Eye lineInches (cm) |
| 3 1/5 - 12 inch (8 - 30 cm) |
| Neck CircumferenceInches (cm) |
| 24 4/5 - 33 1/5 inch (62 - 83 cm) |
OB1 - Malinois, GSD Bitch, Doberman
| LengthInches (cm) |
| 5 1/5 inch (13 cm) |
| CircumferenceInches (cm) |
| 12 2/5 inch (31 cm) |
| Eye lineInches (cm) |
| 3 1/5 - 10 4/5 inch (8 - 27 cm) |
| Neck CircumferenceInches (cm) |
| 13 1/5 - 22 inch (33 - 55 cm) |
OB2 - Big Malinois, Middle GSD
| LengthInches (cm) |
| 5 3/5 inch (14 cm) |
| CircumferenceInches (cm) |
| 14 inch (35 cm) |
| Eye lineInches (cm) |
| 3 1/5 - 10 4/5 inch (8 - 27 cm) |
| Neck CircumferenceInches (cm) |
| 15 1/5 - 24 inch (38 - 60 cm) |
OB3
| LengthInches (cm) |
| 5 4/5 inch (14.5 cm) |
| CircumferenceInches (cm) |
| 14 4/5 inch (37 cm) |
| Eye lineInches (cm) |
| 3 1/5 - 11 3/5 inch (8 - 29 cm) |
| Neck CircumferenceInches (cm) |
| 21 3/5 - 30 2/5 inch (54 - 76 cm) |
OB4
| LengthInches (cm) |
| 6 inch (15 cm) |
| CircumferenceInches (cm) |
| 16 2/5 inch (41 cm) |
| Eye lineInches (cm) |
| 5 3/5 - 13 3/5 inch (14 - 34 cm) |
| Neck CircumferenceInches (cm) |
| 24 4/5 - 33 1/5 inch (62 - 83 cm) |
BT - Bullterier male
| LengthInches (cm) |
| 5 3/5 inch (14 cm) |
| CircumferenceInches (cm) |
| 14 2/5 inch (36 cm) |
| Eye lineInches (cm) |
| 1 3/5 - 10 2/5 inch (4 - 26 cm) |
| Neck CircumferenceInches (cm) |
| 16 - 28 4/5 inch (40 - 72 cm) |
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