Nancy Drew Hollow Oak enamel pin featuring Nancy Drew from her revised version of the classic Nancy Drew book, The Message in the Hollow Oak which our theme book for our 2026 Nancy Drew Convention in St. Louis. (Hollow Oak book shown for reference is not included!) Enamel pin is around 1 and 1/4" in diameter. PVC back over the pin part. Metal/Enamel. We made a limited supply of these for our St. Louis Nancy Drew Convention goody bags and absentee bags and are selling around 25 leftover. Very limited edition and supply.