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