I have a little stash of broken onesie's - I just hung onto them - hoarder that I am - anyway I turned this one into a bobby pin - there are no markings whatsoever on the backside as shown - I think it was an 80's knock-off piece - not sure. The bobby pin measures 2 & 1/2 inches long and the button measures 1 & 1/8 across. Of course this one is another one and only.