According to American Kennel Club ( AKC ) standard , male Neapolitan Mastiffs should measure 26 -- 31 inches ( 66 -- 79 cm ) at the withers , weigh 130 -- 155 pounds ( 60-70 kg ) , while females should measure 24 -- 29 inches ( 61 -- 74 cm ) and weigh 110 -- 130 pounds ( 50 -- 60 kg ) .
According to American Kennel Club ( AKC ) standards , male Neapolitan Mastiffs should measure 26 -- 31 inches ( 66 -- 79 cm ) at the withers . They should weigh 130 -- 155 pounds ( 60-70 kg ) .