Under six inches... give me thin with good edge retention. I myself have zero use for a thick 4 inch knife made of super tough steel. 6 inches and over....I will sacrifice edge retention for toughnesss, especially for 9". Other people use their knives differently though. SR101 on the sub 6 inchers would be great to me...and make em thin <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />