I actually don't have a template - I sort of winged it. I had the dimensions of the stateroom number and the stateroom door, but since math is
not my area of expertise, I just looked around the house until I found a really big circle. I ended up using a garbage can cover.
I traced it, put the smaller circle inside and then used a ruler to draw lines to divide the circle into mostly-equal parts. That part took some trial and error. Then I cut them out, laminated the wedges, and then stuck the decorations on that. It was a little time consuming, but I think it was worth it.