This is a replica of the oversized Iso Chips that were made for the Season 6 episode "One Little Ship", as seen at the top of the fourth picture. Made of 1/2" acrylic, the circuit pattern is lightly laser-etched into the surface instead of silk-screened on which was how the production-made ones were done. Based on reference of a screen-used piece, it measures 4" x 14".
