When people are looking to get a replacement grille or register for their home, the easiest question would be “what size do I need?”, or is it….
These grilles are custom built to fit. Fit what you ask? Well, since your old grille is not likely one we built, we cannot go by the outside dimension (flange to flange) as they vary by builder and model.
The dimension we need is the Actual Hole in your wall. Also, take a few measurements each way at a variety of locations. This will let you (and us) know the size that will fit best.