And I thought I was crazy. King size is the biggest & had thinner batting but still nearly worked me to death. Good luck.

Made 3 oversized Kings = 125" X 125"

I think mine was 108 x116. That's large enough for me.

My first quilt was a Calif. king quilt.

You are indeed brave! Go for it. The largest I ever done war 120 x 120 King Size. I think you idea of making a slightly smaller center will make it more managable.. Good luck and post pics!!

Didn't measure it but when it was done it was square for a king with enough to spare to hang down on bottom and sides. That was the QAYG DWR