The standard American Bully type is a medium size dog with a compact bulky muscular body, heavy bone structure and blocky head.
Male dogs must be 17 to 20 inches (43 to 51 cm)
Females must be 16 to 19 inches (41 to 48 cm).
Males under 17 inches (43 cm) but no less than 14 inches (36 cm) at the withers
Females under 16 inches (40 cm) but no less than 13 inches (33 cm) at the withers.
The classic is a lighter frame dog than the standard but falls within the same height range.
These dogs do not display the exaggerated features often found in the other varieties, and arguably display clearer American Pit Bull Terrier/American Staffordshire Terrier lineage.
An XL type is determined by its adult height
Males between 20 inches (51 cm) and 23 inches (57 cm) at the withers
Females between 19 inches (48 cm) and 22 inches (54 cm) at the withers.
An XXL type is determined by its adult height
Males at 25 inches (58 cm) or more at the withers
Females between 24 inches (55 cm) or more at the withers.
Male dogs must be under 17 inches (43 cm) at the withers
Females must be under 16 inches (41 cm) at the withers