just a simple scalable button with a curved round edge and four holes. scale, print as many as you need, then sew them on your clothing or bags or furnishings. update: see instructions.
update: added button07, slightly thicker than the last button. this took a lot of tweaking of skeinforge to print well, even after the calibration of my machine. to maybe help someone else's tweaking, i added the gcode i used with the best print of button07 on my batch 8 makerbot with a heated build platform (hardwired to 12V), with a mk4 plastruder, raftless.