There you go....looks like a good screen - I'm about to build a grass box in my run, too and was going to use hardware cloth on a frame set on landscape timbers - thinking that would let the grass grow longer and maybe stand a better chance of not getting pulled up by the chickens. Don't know though.It was on this thread that I saw about the grass frames for the chickens so that they can eat greens without digging up the grass. Just when I was calculating what I needed to make the frames, I saw some old screen frames for sale very cheap. So, I got them and my granddaughter and I took off the screens and put in hardware cloth and put them in the yard and threw in some grass seed. So here it is.