I'd normally be too lazy to measure myself (especially at this time of night) but there just happened to be a ruler sitting in front of me...
I consider myself short-fingered considering the hard time I have stretching to four frets, so here ya' go.
Index - 3
Middle - 3 1/4
Ring - 3
Pinkie - 2 1/4
It depends on where I measure them from. From the knuckle, the web, or the crease on the underside.....?
A better measurement of hand size would be fingertip to fingertip. Without any pressure on the fingers, I can stretch 9 1/2" from pinkie to thumb tip and 7 1/4" from pinkie to index.