Tear off the branch and measure the total length.

Method C. Sounding rod depth required to hit the prostate.

I know it sounds odd to do this on a tree, but trust me, it works.

THE CYLINDER MUST NOT BE HARMED!!!

I would use 0,5x(A+B) because chicks dig a big branch.

Half the length plus seven

The question is, are we talking about a very normal cylinder? (possibly stuck to something?)

This can be easily calculated by the formula [(length x diameter) + (Weight / Girth)] / Angle of Tip^2

You have to push the branch down with one hand, such that it is perpendicular to the trunk. With the other hand place a ruler to measure trunk to tip via method A. This gives the honest expectation of ''usable" length.

Shine a light directly down on it from above. Measure the shadow

Loggers should be called arbortionists.

Measure from the roots

here is an authority on the matter

https://m.youtube.com/watch?v=81bt0ZJLMas&pp=0gcJCUACo7VqN5tD&ra=m

Bend it straight, then measure

Average them?

Probably from the side tbh as opposed to either of these two