small frame vs large frame

The difference between small frame (small circle) and large frame tai chi form:

There is saying in China 内传小架,外传大架, "small frame reserved for family insiders; large frame for everyone else."

Small Frame does not mean: just have smaller movements. There are fundamental differences between small and large frame. It is the internal discipline in movements (all movements are carried out from the torso, not from the limbs) resulted in small frame.