Since all (read 99.9%) shorboards used to have three fins you could use the name thruster for any shortboard you saw out there without looking like a fool. Use at least 2lb/cu.ft. foam on your first board. Man ‘guilty’ for the alaia comeback is shaper Tom Wegener who began making alaias and testing them with pro surfers around the year 2006. Typical dimensions? Traditional shorts are sewn and like shirts, the higher the stitch density the better it is, but also the quality of the thread is important.