Chrome dev-tools that sets height / width?

I found myself helpless when I need to find who is responsible for setting the property values ​​of elements. It usually takes a while to point out the problem.

Can anyone share a better strategy if you land on the page - see that the computed height is 500px but no authority has explicitly set it - yes, I eventually find a reason, but I would like to be a little more methodical.

thank