11" wide x 3.75" high
"South Atlantic Large Marine Ecosystem of NOAA fisheries - The Bump - 31º55' north, 74º11' west, 220 meters." This is from R/V Oceanus cruise OC376-2 B0x Core 11. Googling the Charleston Bump brings lots of informtion.
Other glaze is celadon. Central bird filled with clear sea glass. Grace did well creating a harmonius world in this piece.