This boot is very comfortable - you can literally walk all over town right out of the box - they are a little warm though, perhaps because they're vegan?  the color isn't quite black, it's more like a deep eggplant than black, and some parts look a little lighter as if the dye has worn off...however, they are still super comfy and if you're not particular about getting a truly deep black pair of boots - i highly recommend these.  the calf is large -- large enough to fit under a normal pair of jeans, nonetheless skinny jeans, and i think i have an average to 'full' size calf -- i.e. some boots don't go all the way up on me- but these do...jessica simpson boots do...if this helps in your measurements.  they also have some cute plaid patterns that i'm thinking of getting as well.

***EDITED***
After wearing these boots pretty consistently for a few months, I started developing some foot pain.  I'm sad to say but I honestly think these boots and their lack of arch are the culprit.  Since then I've had to wear only fit flop brand or wear orthodic inserts.  When it first started happening I would only find comfort in rolling my foot over a softball to give it the right bend.  Save your feet--- do not buy!