The fronts are ~16" wide, sides ~10", and across the back 4.5".
Its 9.5" deep. I didn't write down the angle, but draw it out
on graph paper first, calculate the angle, set the saw once and
make all the cuts at the same time. I've never been able to
set the same exact angle twice.
I forgot to measure the hight, but I think its between 16" and 18".
It will be determined by your required volume. I can give you
construction details if you need them. Let me know if you need
anything else.

Chris