We have a faux pearl sweater clip / guard vintage item.  It measures about 7 1/8" in L with the clips about 1 1/8" x 1 1/8" There is a faux pearl center chain as well as a 2nd chain.   This is how I obtained this piece - I believe someone adapted clip earrings to make a sweater clip.    The clips are strong so it should work.  Around the faux pearls there is a hint of brown color from old glue.  The faux pearl chain metal portion have tarnish in between faux pearls.  The metal on the chain is duller than the end clips.