It's all relative to each woman, I think. B/c a persons hand basically remain the same size throughout life, therefore, they have their own measuring stick that never changes for them. So using their own hands immediately they know when they found "a big one" ! Regardless of how big the dick is in inches, to each particular women big can be judge based on past partners. I've had many use this technique for measuring, some knew how to do already and some I've instructed what to do. I love women w/small hands btw ! Basically every woman I've ever discussed this with can confirm, their personal reference point which works for them. That doesn't mean every woman has done this w/every man they have been with either. The next point to consider is girth based on the "2 hand rule" . Two dicks the same length but significantly different girth is where big really gets defined. Most, not all, women I discussed this with prefer girth or thickness. So a thick "2hander" is a big cock for ALOT of women...and men as well I suppose !