I see cues in different lengths. Around 57" - 62" usually. Generally the accepted "normal" cue is about 58" for, as far as I know, most American cue sports. Is there a Regulation size for cues that is dictated by accepted rule books? American cue sports? Snooker? Golf? Jump Cues? For instance, I know some people are perfectly adept with shaft jumping when they can, when it's permitted, but would there ever actually be a jump cue at about 30"?