draw size port of hfss

Hi'. I want to draw port of hfss. it has random size.
example, port size 3χ3mm. i don't want to draw full port.
i hope every body give me some steps draw it
thanks

Hi
you should determine the port type: Lumped port or wave port, for lumped port its size based on the your feed input impedance, for example 50 ohm, but for wave port its width and hight are approximately 5 to 10 times of the feed line width and hight