Describe the problem
My target is to reconstruct the model that contains the size infomation. I do not require the size to be accurate, about right is acceptable.

Taking the official tree example, I reconstructed the model and measured it in meshlab, the size is shown as follows:

So here's my question: does the measured 2.62525 correctly reflect the tree's size infomatioin? If not, then, is there a quick and solid way to get the size infomation? What I can imagine is to add a marker (which has a known size) when taking the photo, after the model is reconstructed, rescale the model such that the marker's size is its actual size. I hope if there should be a better and more effective way. I appreciate if anyone could help me solve this issue. Thank you!