Size

Size refers to both the actual drum sound itself and the allowed "space" the drums occupy within the recording. Size is equated to all of the following characteristics: realistic (or unrealistic) ambience, a good aural "picture" of the drum stage, good internal drum balance between the individual drums, good low frequencies and high frequencies, punchiness or "weight" in the low mid-range frequencies and dynamic range or how well you can hear the subtle to the loudest hits without distortion.