It is about 1 3/16" across and has a safety C clasp.
There is a little wear which is normal for vintage jewelry.
Marked "Trifari[with the crown](c)" on the back.
*Whenever you wish to clean these, or any vintage jewelry, please check to make sure the finish and pinback... are very secure and then have the pieces of vintage jewelry gently cleaned by a jeweler or collector who understands vintage jewelry.
*All items are "as is" and there are no returns so please read the descriptions and see the photos before you buy.