Your choice of 3 sizes: 11" x 11" or 22" x 22". I make this from 14 gauge steel and cut this with a hand-held Plasma Cutter, then polish it and heat with an Oxygen-Acetylene torch to create the beautiful blue/brown finish. The final step is clear Powder Coating which preserves the finish and prevents tarnishing and rusting and allows you to hang it anywhere - outside or inside!