These look like nice boots, but I have never had good luck purchasing any kind of boots, sneakers, or shoes on the internet.
IMHO footwear should be tried on, and then if it actually fits right, purchased.
After all, the worst thing in the world is a poor fitting pair of boots, when you are already out in the trail!
Brick and Mortar stores like REI, Cabelas, LL Bean, Bass Pro, Orvis, are best for purchasing boots.
If I was going to...