All colorsLitter size. The standard American Bully type is a medium-sized dog with a compact bulky muscular body, heavy bone structure and blocky head. Male dogs must be 17 to 20 in (43 to 51 cm), while females must be 16 to 19 in (41 to 48 cm). www.ukcdogs.com. Retrieved September 27, 2018. Sinclair Broadcast Group. Retrieved September 27, 2018. 7 References.