How to get the properties like width, number of legs of an instance present in a schematic

Hi..
I want to know the properties of an schematic instance when we query the instance using skill.
For example width of the instance or number of legs or name of the instance.

I am opening the schematic by its library,and cell name in schematic view in db mode

test = dbOpenCellViewByType("library" "cellname" "view")

test~>instances 

by this i am getting dbids of all instances.

so what to do next to get select each instance and get the properties of that

Thanks in advance for the solution