I bought the Jinbao DF-05 / JB-8002 Destroy Emperor to go with lonely Legacy United G1 Optimus Prime. I wanted a figure to match the scale and I did some research about the height (YouTube videos, toy listings) and got various numbers. For the record, using a Vernier caliper, I measured Optimus at 12.7cm with legs straight, which is the same height as the Jinbao (head height, not gun barrel height).