Size of muzzle: 2 5 B0 BG - Beagle SH - Shih Tzu D1 - Doberman big EB1 - English Bulldog small GSD - German Shepherd OB3 12 R2 3 7 B2 R3.5 BX - Boxer DBD - Dogue de Bordeaux EM1 - English Mastiff 0 R - Rottweiler 4 A - Amstaff B4 RB - Russian Borzoi D0 - Doberman small bitch DH - Datchhund F1 - French Bulldog Big OB1 10 R1 - Rottweiler 6 B0.5 BM - Bullmastiff SL - Saluki D2 EB2 - big English bulldog, short snout big dogs J1 OB4 13 R2L 3.5 8 B3 R3L BX1 - Boxer small DD - Great Dane EM2 - English Mastiff M - malinois R0 4L B - Boston Terrier BC - Border Collie RR - Rodesian Ridgeback D1 EB - English Bulldog F2 - French Bulldog Big OB2 11 R1L R3 6L B1 BT T - Terrier D3 EM - English Mastiff J2 P - Pitbull 9 B3.5 R4 D - Doberman small DD1 - Great Dane small F - French Bulldog 1 R1