This pretty sweetheart bracelet is fully expandable. Made by Co-Star sometime in the 1940s, evidenced by the Sterling Silver base for the gold filled metal, mostly seen in during WW2.
The engraved frame heart center is blank and you can have your choice of initials engraved.
The center is 7/8" wide by 15/16" tall. The bracelet itself is 5/8" wide.
It is made of warm yellow gold filled. The condition is excellent and the size is adjustable.