Math and Science Data.

Weights             Displacement in Cubic feet  
Tom = 145                      2.3
Cheyne = 148                  2.4
Wally = 165                    2.6
Chris = 168                     2.7
Mike = 275                     4.4

Suggested size of shoe 6-1.5-1.5
amount of shoe out of water 1/3 out and 2/3 in to keep center gravity lower
minimum displacement per shoe 6.6 cubic feet