I had to chuckle today when I was moving some wood into the garage. I finished off one stack and moved on to a stack made up mostly of oak that I split in the spring of 2009. I planned to burn it last year but never got to it since the winter was so warm. I split most of it small since it was my first year burning in something other than an open fireplace and wanted to use in that year.(yeah right) Anyway as I was grabbing those splits today I kept laughing that these were what I now consider small and almost filler size splits. I took one split that seemed to be on the "large" size for that stack and took a picture of it next to some current stuff I'm splitting. The triangle split is about 3 1/2x5, the rectangle is 6x8. Looking at some others in the stack the biggest squares seemed to be about 4x4 and those are few and far between, the average squares/rectangles seem to be 3x3 or 3x4. I'm glad the BK handles the small stuff just fine.