I recently got a set of titleist 755 irons with project x 5.5 shafts out of the preowned section at golf galaxy. They seem to be shorter than my previous irons. My 2 questions are, what is the standard length of the irons? And what is the swing weight of the 5 iron? 

Also these have matching serial numbers so were they custom ordered? 

Lastly what is the standard length of a 50 degree vokey since the wedge is longer than the pitching wedge In both of my sets. 

Also what are the standard lofts on all the clubs. 

Thank you so much, Bret