It looks like someone took two side lites and tacked them together, covered the seams with molding, gave it a clean paint job, and framed it up in a "jamb" of sorts. It's a bit unorthodox but I can't lie, it sure looks nice. It would be great to divide a large room; allowing light through but creating a sense of privacy. Unfortunately the glass isn't thermopane so it's not suitable for exterior use in your home, but it would be a cool addition to a shed or treehouse build! Measurements are include frame.