They are about 6'' long had one last year bred of normal ferrets not on purpose it was just a runt,i do prefer smallish types for purse netting but obviously not too small as for the comment about greyhound ferrets they are 2 different strains greyhounds dont have to be small just long and thin with a high back but they are quick.
Ive been told micros useally have health assoiciated risks and normal size organs.