Magnum:

The fin stock is 1/8" thick, semihard balsa

Booster:                                  70 mm     2 3/4"
Sustainer:                               458 mm    18 1/32"
Payload coupler (exposed portion):        10 mm     0.394"
Payload tube (clear BT-60):              127 mm     5"
Nose cone ogive (to 2mm radius meplat):  212 mm     8.346"
Launch Lug, 3/16":                        50 mm     2"
Motor mount tubes (both)                  70 mm     2 3/4"