THESE ARE 1/2"  ON THE DESIGN. THESE ARE 3/4" LONG . HAS A FIXED BACK IT DOES NOT MOVE. THESE ARE ACTUALLY ANTIQUE CUFFLINKS. I HAVE NOT HASD THE GOLD TESTED. BUT IT LOOKS GREAT. THESE HAVE NO MAKERS MARKS TO GAIN ANY INFORMATION FROM. THIS POST IS FOR ONE SET OF ART DECO CUFFLINKS.