>Do you like a little space or do you want a perfect fit with toes and heel fitting perfectly?

You *need* some extra space in front of your toes to account for walking down a hill or even taking a short step or you'll hurt your toes.

Also your feet swell/expand during the day deepening on hydration, and bloodflow. You always need some room in front of your toes - like 1/2 inch.

I've had an injury from a "perfect" fit shoe in the past - now I need a little room.

And I size up my hiking shoes even a little more because of all the downhill.

I can't imagine wearing heels - what that does to your feet.

tldr: Need 'em a little big.