2.75" long by a full 1/8" thick fiberboard with translucent plastic rectangle on the back which anchors the horizontal bar pin. The only flaw on this piece is that the plastic loop to hold the pin in place over the years has curled slightly so there is no gap between the loop and the base to allow the pin to be opened. Our first we've been able to offer in ten years and an example that displays essentially Mint. Front bottom edge has tiny copyright of issuer "Fawcett Publications, Inc."