I am 6'-5" tall with long fingers (from tip of middle finger to point where hand meets wrist it is 8.5") and I
use to play basketball and I
use to be able to palm a basketball in each hand (with emphasis on
use to).
When I hold a bass, it looks like a guitar on me. My wingspan is 6'-8" (please, no caveman with knuckles draggin' on the ground jokes

) and I can easily do one finger per fret down at the first four frets with ease. Playing my P bass feels right. When I play my Jazz bass with a thinner neck, it feels like I am holding a broomstick handle.
When you watch Victor Wooten play, the first thing you notice (besides that his mouth is always open) is that his fingers are very short and stubby. Yet what he can play is amazing. Way more amazing than a 6'-5" knuckle-draggin' caveman with a 6'-8" wingspan....