Other reviewers say they feel like these boots fit large, so I was expecting toe room to be similar to the Caribou.  After returning a pair of these boots 1/2 size smaller than my normal fit, I think sizing is right on target especially given the fact that you may want to wear a heavy wool sock for warmth.  Keeping plenty of space in the toe is essential to a warm foot.  I usually wear a 7.5 - 8 shoe.  The 8's that I ordered have plenty of room in the toe cap to allow for good circulation and room for a wool sock.  They don't have a thick lining in the toe, so I imagine I will definitely want to wear more than a thin sock.