A concept consists of a series of base/reference images for you artists out there,

Simply use : Solo, white background, simple background, full body, /body type/ to get the result you want

Body type comes incomes in about 7 types 

Chibi, Normal, Cute, Buff, Toned, Sexy and Slender :

Chibi will produce , chibi styled reference images

Normal will produce a more standard looking, kind of reference images

Cute will produce a more comical styled character with large feet and long but stick like limbs

Buff will produce really, hulking type of images

Tone will produce a more heroic looking, but not too hulking type of images

Sexy will produce a more , large breasted type of images

Slender will produce a more, slender and smaller breasted type of images