We have  4  hair pin legs, they are vintage.  They are about 15 3/4" in H with each arm on top to secure it to the table measuring about 4" on either side.  The top area to secure it has some rust (I took a photo of the worst one).  The finish on them is fair with a tad bit of surface rust peaking through here and there.  Overall these are in good to fair condition.

4 Hair Pin Legs Metal Vintage Items