The purple line is to the right of a young 8 trembling aspen sapling that got its chance here on the north side of the berm when they stopped cutting the grass in 2009. The purple line goes from the ground up to a branch that was at my shoulder level (5ft). The yellow line is as high as the sapling and is over 6 times as long as the purple line indicating the sapling is a little over 30ft tall. The trunk has a circumference of 12 inches. Not bad for 8 years of growth.