The body size of a character refers to the size and position of their hurtboxes, primarily while being juggled.
Many Combos don't work on all characters, and it can be useful to refer to broad categories of body sizes to avoid having to test a combo on every character and comprehensively list and remember all the ones it does and doesn't work on. However, using categories is never robust: a combo that works on smalls is not guaranteed to work on everyone else, and there's always differences between body sizes within a category. The only way to be sure of which characters a combo works on is to test against them all.
The broadest category is “male” and “female”. However, there are almost no combos that work on all males and no females (many combos work on big females but not small males), so using this category alone is usually insufficient. Leo is considered female in this context.
|Ogre||Ancient Ogre, True Ogre|
|Big||Bryan, Eddy, King, Paul|
|Normal||Hwoarang, Jin, Law|
|Small||Lei, Yoshimitsu, Heihachi|
Heavy characters, as well as Kuma, are notable for having shorter legs.