My wedding is under a tent. The tent is 35x40. I am going to hang paper lanterns in three different sizes from the ceiling. Any idea on how many I should get and what sizes? I already have 6 plain white ones that I believe are 18 inches which I'll put down the center of the ceiling, and I want to do orange in a medium size and yellow in a smaller size next to the white ones coming down the sides. Maybe 14in and 10in? Or 10in and 8in? Has anyone done this before?