As the saying goes, you can never have too many clamps.  Woodworkers are always adding clamps of various styles, even making many of their own as the need arises.   This area of the wall is reserved for my larger clamps, including some Bessy K-body cabinet clamps, some smaller J clamps, a few of my more frequently used pipe clamps, and other odds and ends.
I enjoy having the needed clamps available and easy to get to.  They do take up a lot of room, but these racks keep the K-bodies compact.  They are in lengths of 24", 40" and 50".  I even see space available for a few more, hmmm.