The pin is 2 1/2" in diameter. Pin back works well. It is hallmarked Pegasus Coro.
The bracelet is 7 1/4" long by 1 1/8" wide with a safety chain that may not be original to the piece. The clasp is the fold over type that has a bend but works just fine. This, too, is hallmarked Pegasus Coro.
The clip earrings are 1 1/8" in diameter and are adjustable. The clips work well. They are marked Coro and Pat 2,809,550 for 1957. This is a fabulous set in fabulous condition.