We have 2 Usher clips nos.  These are at least 10 years old, they were purchased from a jewelry manufacturer which had gone out of business.  The rounds are on a tie clip like base (pls see photo's).  The round measures about 1" across the center and the clip to the end is about 1 3/8" in l.  I have a few sets of these available.  The clips are a gold tone metal. 

2 Usher clips nos