Naturalizer sells this EXACT boot as "Paolina" on their website: [...]
They list it with a wide calf option, and I even called customer service to ensure the boot would fit my exact calf measurement.  It was so tiny I couldn't even get the zipper past my ankle. I let two friends try on the boots, both have VERY slim legs - they fit perfectly on them.
It is an absolutely gorgeous boot for those with slim legs, really well made, beautiful classic lines and top quality. But not for people who do not have very slim calves.
Naturalizer has them on sale right now for $99.