One of the little pegs that hold the strings in on the acoustic's body has snapped, leaving half a peg inside the hole along with the string. I can't get the fucker out; is there a technique to this shit? Pics below:

http://img227.imageshack.us/img227/825/18082010018.jpg
http://img826.imageshack.us/img826/4554/18082010019.jpg
http://img580.imageshack.us/img580/670/18082010020.jpg

Are these pegs a standard size for all dreadnought acoustics? If not, how do I ascertain which type I need?

Cheers fellas.

EDIT: ignore the second question; I have an old acoustic and I tried one of its pegs in the new one and it fits. All I need to do is get the broken one out. Needle-nose pliers don't help, incidentally. There isn't enough "purchase" to use them or any other sort of pliers.