I ended up doing two versions of this, for the first my batting square was slightly smaller – about 2 &1/4″ square and for my second I cut my batting square a bit bigger to 2 & 3/4″ square.
I found some fabric scraps I liked the look of and even a couple crumbs that had puncture marks in them from a previous sewing project!
When I was done sewing on my strips I flipped the block over and pinned back the excess backing fabric.