Sorry if this been asked before, I searched the net and found no answer. On the front panel for the headphone and mic jack, what size plug is it. All the ones I have seem tight and I'm worried of messing it up.
The front I/O panel holds a reset and power button on either side of two USB 2.0 connections and two 3.5mm audio jacks. The two tiny holes to the left are for the power and hard drive activity LEDs to shine through.