Diamond vents measured corner to corner, not across the flats.

We made the order and had trouble getting our questions answered. In the end we made it work, but until we got product and held in our hands, not sure what we were getting. don

I needed decorative small vents for an 8 x 8 garden shed. I could not find any that were flush mounted, so I bought these and my carpenter built a frame around them and installed them. The look really turned out nicely. I am very pleased.