They fit well but not the best to walk around in after an hour or two but great for riding/standing on pegs with.
You should have no problem as I have skinny calves and also thin feet.
They do take a while to break in. Worth it though as they've lasted me a fair while.
I would always recommend trying footware you want to buy rather than blindly buying on the net.
i have alpinestars tech 8 boots. they're a bit on the heavy side, but they're strong as, and feel safe (considering my bike weighs three times as much as me!) they look cool too!!!!!!!!