MiR Jewels Of The Sea 11.4" x 11.9" Polished Shell Rectangle MosaicShell mosaic tiles, each measuring 0. 4" x 0. 8" in a rectangle form, are part of the MiR Mosaic Jewels Of The Sea series. These polished finish tiles, which measure 11. 4" x 11. 9" each sheet, combine to create a gorgeous mosaic design that evokes the splendor of the sea. Whether used as a backsplash in the kitchen, bathroom, or feature wall, these tiles may add a touch of refinement and charm inspired by nature to any area.