I made this guy using a size F hook. My worsted weight wool was a bit old and thin. He's about 6 inches tall (7 if you count the tallest branch). I need to find a better pot to put him in. I just stuffed some green tissue paper in there to give him some height and help him stand on his own. It was purely for pictures, because I couldn't wait for the actual finished product. I'll have to make a special trip to look for his new planter home and update the pictures later.
**here's an updated picture**