Your quest, should you choose to accept it, is.............

[VeniVidiVickiQV]

to find a great pair of mid-length boots for winter that are warm and cosy. I'm not thin so long boots are out unless specifically for chunky calves

DUOBOOTS.COM
Great fitting boots for all sorts of calves.
You send your calf measurements and they make boots to fit.

these?
A lot of the mid-length boots seem to be fairly chunky. Is that ok or are you after elegant? Flat or heel?

Nice but maybe not cosy

these?

Cosy but maybe a bit grannyish?