What exactly does this mean

Thinking of putting a adjustable Handel in wife's paddle for more use but what exactly do Kialoa mean by this bellow



Choose the shortest length you want and the paddle will adjust 6" up from there.

What would be the shortest length you want.

Think about it as, the shortest length that the shortest person using the paddle would prefer....

or,
If you wife prefers her paddle to be the same height as her (head height) then by using the adjustable section, it will go from that height to 6" taller than her.....