I have a quantity of these so check how many are available if you want more than one. One of these has a small weld repair to it and the center design may be tweaked a little too.
Overall width is 31 1/8" and height is 12 7/8". The inside frame that would fit into your opening is 30" wide to the outside and 11 5/8" tall to the outside.The holes are reinforced with small backer plates. I pack my items very well so they will arrive safely. The item "Antique Floor Grate 31 x 13 Wrought Iron Cast Victorian Cold Air Return Register" is in sale since Wednesday, September 07, 2016. This item is in the category "Antiques\Architectural & Garden\Hardware\Heating Grates & Vents".
The seller is "joshwindsweptacres" and is located in Oakfield, Wisconsin. This item can be shipped to United States.