Thickness near the earphone jack hole? If a TPU case is going to protect the phone it has to be at least a few mm thick, and you don't want the hole in the case to be much larger than the hole in the phone, so that will prevent some thick plugs from sitting all the way down. And you can forget right-angle plugs altogether. But there are some pretty slim plugs out there for a couple of bucks, and a snip and a little soldering will put one on the end of your earphone cord. (I don't like the idea of an extender - it puts too much torsion (sidewards pressure) on the jack if you puch the plug to the side a little bit.