Good questions. 

As I am able to see it, there are a number of fields that are nested, but interact with each other and can even spin in opposing directions.  The size of them range from rather small and within the physical body out to as much as 30 ft or more from one's center of gravity.  There are also fields around the various chakras.

There is, in addition, a magnetic field that looks pretty much identical to any magnetic field with a positive and negative pole and a toroidial shape.

It is hard to say anything authoritative about the energy fields because they are quite variable.  They are not only different from person to person, but change constantly with people's moods and thoughts.  Some of the energy fields have been captured and studied by science.  The magnetic field is actually well known... as is the bio-electric field captured in Kirlian photography.   Kirlian photo of a hemp leaf.

The phantom leaf effect. 

Here is a report from someone (admitedly freaky) who was trying for a phantom leaf effect and discovered something even freakier... something that kind of goes in the direction of the old "Secret Life Of Plants" stuff.

Anyway, the holes are variable... like the tunnels of a block of Swiss Cheese.  More than that I can not say, except that they leave you vulnerable. 

Make of it what you will.