// GetModelDimensions
void GET_MODEL_DIMENSIONS(Hash modelHash, Vector3* minimum, Vector3* maximum);
Gets the dimensions of a model.
Calculate (maximum - minimum) to get the size, in which case, Y will be how long the model is.
Example from the scripts: MISC::GET_MODEL_DIMENSIONS(ENTITY::GET_ENTITY_MODEL(PLAYER::PLAYER_PED_ID()), &v_1A, &v_17);