Hey ladies, I have wanted to buy a pair of Duo boots for over a year thanks to all the great feedback people have given here. I have 16.5" calves.

Anyway I was hoping you all that own a pair could give me some feedback on sizing.
Do you find the shoe sizing accurate? I wear an 8.5 or 9 most of the time, and usually by 9's in boots for some wiggle room. Should I stick with a 9 US (40 UK) in Duo, or should they size up or down?

Also, I measured my calf and held the tape taut but not tight and got 41 cm. Should I add a couple cm for pant tucking?? Or just rely on the natural stretch out of leather to make them more comfortable in the future???