We have 2 sweater clips both vintage items.  In the first photo is a sweater clip which "may" have been put together, this is how I purchased it.  The ends have backs similar to clip earrings, they are strong so should work fine.  They have leaves on the clips with rhinestones going down the center.  The middle chains are gold tone and faux pearl.  It measures about 7" with the leaves measuring about 1 1/4" x 1".  The second sweater guard has buttons on either side, no clips.  It is more of a bronze color and has raised crowns on the buttons.  There is a double chain in the center.  It measures about 5 3/8" in W, the buttons are about 3/4" across the center.  It is in gently used condition.  

2 Sweater Clips Vintage