*Click photo to enlarge*
This is a USS Philippine Sea UIM
USS Philippine Sea CV-47 Unit Identification Marker
I believe this is the Carrier not the Cruiser.  It does not have a merrowed edge.
It measures approx. 3 1/2" across
There may be a spot of dried glue on the back from where it was attached to an index card in a collection
Domestic shipping is via 1st class mail stamped envelope.