I think "big picture" for me I like them from 6"-20". I can easily lift them myself, since I work alone usually, and can split them with a maul and manuever them into position. I did get the rest of that boxelder this past weekend and had to noodle all the cookies as they were too big for me to handle on my own. As much fun as that was, I was thinking to myself, a smaller tree and I wouldn't have this extra step. But of course on the flip side, I also got to cut a nice size ash tree last Saturday and although it was tough moving the logs it was fun to cut(and easy to split).