6 pieces at 16'0" long and a 8'0" piece
It's 3-1/2 " high
Yes they do for inside and outside corners. I made my own using the leftover crown.
Not sure as I kept a consistent size.
its sold by the foot, the longest is 16'
use 15g and nail into studs behind wall and ceiling ,if no studs available add a nailer or a support to nail into.
10 sticks they come in 16 ft unless you have a lot of different areas to put in might get one more just in case so your not short or if you mess up
16ft sticks you would need you would need 4 sticks total comes out to be total of 64 ft