BIA Cordon BleuButter Dish W/ Knob

is the bottom part, inside, smooth or ridged? it's easier to clean if where you place the butter is smooth. thanks.

What are the dimensions. How could someone offer butter dishes for sale without providing dimensions to see if the butter you use fits???

Is it very heavy? And is the lip wide enough to set a butter knife on?

Does this fit Western stubbies or the long, thin sticks from the east coast?