I had more fun building this floater frame a few months ago to replace a painting we had over the fireplace. The older painting was a gallery wrapped painting and I had just finished this new piece on standard stretched canvas which is 5/8" thick stretcher bars I think. I picked up a piece of oak at out local lumber yard that was slightly over 6" wide. I wanted to make this floater frame with 3" deep sides so this would work.
I cut all of the side pieces on my table saw and began piecing it all together. I won't post any dimensions because these frames I make are always different dimensions depending on the size of the painting.