It took me many years to realize that my small stature was actually in some ways advantageous for playing pool. I'm 5'6 now and used to be 5'7 (shit happens). Mosconi was my height and so was Caras (maybe 5'8) and Fats. Irving Crane was a solid 6'. Balsis may have been 5'8 or 5'9, Ronnie and Kelly about 5'9. Most of the top players were under 6', with exceptions like Puckett, Rempe, Massey, Bob Ogburn and a few others. Jimmy Fusco was probably right at 6'. His cousin Pete closer to my size. Worst may have been 5'10, but very solidly built.
So many very good players who were really short (5'4 or less). Shorty, Parica, Tommy Kennedy, Marcus Chamat, Santos, Alex, Rafael Martinez to name a few. I doubt any of these guys were taller than 5'3. Dennis is about 5'5 or 5'6, so I don't consider him one of the real shorties. Francisco, Efren, Carlo, Lee Vann and Warren are maybe 5'7 or 5'8. Ronnie Alcano is a good 5'10.
Mizerak was over 6' and Buddy used to be much taller, also close to 6' (he's shrunk too). Varner maybe 5'8, Sigel 5'9 or 5'10, Hopkins 5'10 at least, Dallas West maybe 5'8, Ray Martin 5'9 and Swanee was probably 6' tall. Dennis Hatch is over 6', Johnny maybe 5'11. Shane is maybe 5'10 or 5'11, Rodney closer to 5'9. Mika is probably 5'8, Ralf closer to 5'7, Karl Boyes I'm guessing 5'10 or 5'11 and Darren 5'8.
To me 5'9 is about average height and being 5'6 or 5'7 is not really short. 5'4 and under is small stature imo. I'm sure I can think of more excellent pool players who fit this bill.