This product can be true to size for you.... But for me, because i have a wide foot, I had to ordered half size up. And it perfectly fit to me.
Heel measurement is 5 inch high
Boot opening measure 15 inch Round. It also has a little garter on the side so you can add one more inch to stretch.
I'm use to wear heels so for me this boot is very comfortable to walk.
With this boot, my wide foot doesn't squeeze, my toes are comfortable to breath with my socks on.
This boot is until my knee level because I'm only 5 ft. tall
I  wear leggings or light fabric skinny jeans with this boot.
It looks good also with dress, mini skirt or shorts.