These dogbone-like objects are for holding pairs of socks together, so you don't have to roll or tie up your socks. The demo files work for standard men's socks, folded in half and then clipped in the middle. In the Customizer you can adjust length and width to your size of socks. MakerHome, Day 274: http://makerhome.blogspot.com/2014/05/day-274-customizable-sock-bones.html